40525731 has 32 divisors (see below), whose sum is σ = 63048000. Its totient is φ = 25691904.

The previous prime is 40525729. The next prime is 40525741. The reversal of 40525731 is 13752504.

It is a happy number.

40525731 is a `hidden beast` number, since 40 + 52 + 573 + 1 = 666.

It is not a de Polignac number, because 40525731 - 2¹ = 40525729 is a prime.

It is a super-2 number, since 2×40525731² = 3284669746168722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 40525695 and 40525704.

It is not an unprimeable number, because it can be changed into a prime (40525721) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56805 + ... + 57513.

It is an arithmetic number, because the mean of its divisors is an integer number (1970250).

Almost surely, 2^40525731 is an apocalyptic number.

40525731 is a deficient number, since it is larger than the sum of its proper divisors (22522269).

40525731 is a wasteful number, since it uses less digits than its factorization.

40525731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 820 (or 814 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 40525731 is about 6365.9823279679. The cubic root of 40525731 is about 343.4869848809.

The spelling of 40525731 in words is "forty million, five hundred twenty-five thousand, seven hundred thirty-one".