40564751 has 2 divisors, whose sum is σ = 40564752. Its totient is φ = 40564750.

The previous prime is 40564747. The next prime is 40564763. The reversal of 40564751 is 15746504.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40564751 - 2² = 40564747 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40564651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20282375 + 20282376.

It is an arithmetic number, because the mean of its divisors is an integer number (20282376).

Almost surely, 2^40564751 is an apocalyptic number.

40564751 is a deficient number, since it is larger than the sum of its proper divisors (1).

40564751 is an equidigital number, since it uses as much as digits as its factorization.

40564751 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16800, while the sum is 32.

The square root of 40564751 is about 6369.0463179349. The cubic root of 40564751 is about 343.5971911004.

It can be divided in two parts, 405 and 64751, that added together give a palindrome (65156).

The spelling of 40564751 in words is "forty million, five hundred sixty-four thousand, seven hundred fifty-one".