40564251 has 24 divisors (see below), whose sum is σ = 72115680. Its totient is φ = 21396096.

The previous prime is 40564229. The next prime is 40564253. The reversal of 40564251 is 15246504.

40564251 is a `hidden beast` number, since 405 + 6 + 4 + 251 = 666.

It is not a de Polignac number, because 40564251 - 2¹³ = 40556059 is a prime.

It is not an unprimeable number, because it can be changed into a prime (40564253) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 23946 + ... + 25583.

It is an arithmetic number, because the mean of its divisors is an integer number (3004820).

Almost surely, 2^40564251 is an apocalyptic number.

40564251 is a deficient number, since it is larger than the sum of its proper divisors (31551429).

40564251 is a wasteful number, since it uses less digits than its factorization.

40564251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49555 (or 49552 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 27.

The square root of 40564251 is about 6369.0070654695. The cubic root of 40564251 is about 343.5957793715.

The spelling of 40564251 in words is "forty million, five hundred sixty-four thousand, two hundred fifty-one".