40513537 has 2 divisors, whose sum is σ = 40513538. Its totient is φ = 40513536.

The previous prime is 40513519. The next prime is 40513541. The reversal of 40513537 is 73531504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24760576 + 15752961 = 4976^2 + 3969^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40513537 is a prime.

It is not a weakly prime, because it can be changed into another prime (40513597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20256768 + 20256769.

It is an arithmetic number, because the mean of its divisors is an integer number (20256769).

Almost surely, 2^40513537 is an apocalyptic number.

It is an amenable number.

40513537 is a deficient number, since it is larger than the sum of its proper divisors (1).

40513537 is an equidigital number, since it uses as much as digits as its factorization.

40513537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 40513537 is about 6365.0245089866. The cubic root of 40513537 is about 343.4525302241.

The spelling of 40513537 in words is "forty million, five hundred thirteen thousand, five hundred thirty-seven".