40513157 has 4 divisors (see below), whose sum is σ = 40674816. Its totient is φ = 40351500.

The previous prime is 40513153. The next prime is 40513163. The reversal of 40513157 is 75131504.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 40513157 - 2² = 40513153 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40513153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80453 + ... + 80954.

It is an arithmetic number, because the mean of its divisors is an integer number (10168704).

Almost surely, 2^40513157 is an apocalyptic number.

It is an amenable number.

40513157 is a deficient number, since it is larger than the sum of its proper divisors (161659).

40513157 is a wasteful number, since it uses less digits than its factorization.

40513157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161658.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 40513157 is about 6364.9946582853. The cubic root of 40513157 is about 343.4514564071.

The spelling of 40513157 in words is "forty million, five hundred thirteen thousand, one hundred fifty-seven".