40523537 has 2 divisors, whose sum is σ = 40523538. Its totient is φ = 40523536.

The previous prime is 40523533. The next prime is 40523573. The reversal of 40523537 is 73532504.

Together with next prime (40523573) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38887696 + 1635841 = 6236^2 + 1279^2 .

It is a cyclic number.

It is not a de Polignac number, because 40523537 - 2² = 40523533 is a prime.

It is not a weakly prime, because it can be changed into another prime (40523531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20261768 + 20261769.

It is an arithmetic number, because the mean of its divisors is an integer number (20261769).

Almost surely, 2^40523537 is an apocalyptic number.

It is an amenable number.

40523537 is a deficient number, since it is larger than the sum of its proper divisors (1).

40523537 is an equidigital number, since it uses as much as digits as its factorization.

40523537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 29.

The square root of 40523537 is about 6365.8100034481. The cubic root of 40523537 is about 343.4807861521.

The spelling of 40523537 in words is "forty million, five hundred twenty-three thousand, five hundred thirty-seven".