632278081 has 4 divisors (see below), whose sum is σ = 632338564. Its totient is φ = 632217600.

The previous prime is 632278051. The next prime is 632278109. The reversal of 632278081 is 180872236.

632278081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 88642225 + 543635856 = 9415^2 + 23316^2 .

It is a 3-Lehmer number, since φ(632278081) divides (632278081-1)³.

It is a cyclic number.

It is not a de Polignac number, because 632278081 - 2¹¹ = 632276033 is a prime.

It is a super-2 number, since 2×632278081² = 799551143426085122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 632278081.

It is not an unprimeable number, because it can be changed into a prime (632278021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10080 + ... + 36961.

It is an arithmetic number, because the mean of its divisors is an integer number (158084641).

Almost surely, 2^632278081 is an apocalyptic number.

632278081 is the 13441-st nonagonal number.

It is an amenable number.

632278081 is a deficient number, since it is larger than the sum of its proper divisors (60483).

632278081 is a wasteful number, since it uses less digits than its factorization.

632278081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60482.

The product of its (nonzero) digits is 32256, while the sum is 37.

The square root of 632278081 is about 25145.1403058325. The cubic root of 632278081 is about 858.2939320546.

The spelling of 632278081 in words is "six hundred thirty-two million, two hundred seventy-eight thousand, eighty-one".