632551261 has 4 divisors (see below), whose sum is σ = 634462624. Its totient is φ = 630639900.

The previous prime is 632551253. The next prime is 632551301. The reversal of 632551261 is 162155236.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 632551261 - 2³ = 632551253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (632551201) 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, 955185 + ... + 955846.

It is an arithmetic number, because the mean of its divisors is an integer number (158615656).

Almost surely, 2^632551261 is an apocalyptic number.

It is an amenable number.

632551261 is a deficient number, since it is larger than the sum of its proper divisors (1911363).

632551261 is a wasteful number, since it uses less digits than its factorization.

632551261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1911362.

The product of its digits is 10800, while the sum is 31.

The square root of 632551261 is about 25150.5717827647. The cubic root of 632551261 is about 858.4175248131.

It can be divided in two parts, 63255 and 1261, that added together give a square (64516 = 254²).

The spelling of 632551261 in words is "six hundred thirty-two million, five hundred fifty-one thousand, two hundred sixty-one".