40772161 has 4 divisors (see below), whose sum is σ = 42087424. Its totient is φ = 39456900.

The previous prime is 40772143. The next prime is 40772167. The reversal of 40772161 is 16127704.

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 40772161 - 2¹⁵ = 40739393 is a prime.

It is a super-3 number, since 3×40772161³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40772167) 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, 657585 + ... + 657646.

It is an arithmetic number, because the mean of its divisors is an integer number (10521856).

Almost surely, 2^40772161 is an apocalyptic number.

It is an amenable number.

40772161 is a deficient number, since it is larger than the sum of its proper divisors (1315263).

40772161 is a wasteful number, since it uses less digits than its factorization.

40772161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1315262.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 40772161 is about 6385.3082149572. The cubic root of 40772161 is about 344.1818068397.

Adding to 40772161 its reverse (16127704), we get a palindrome (56899865).

The spelling of 40772161 in words is "forty million, seven hundred seventy-two thousand, one hundred sixty-one".