40017157 has 4 divisors (see below), whose sum is σ = 40614496. Its totient is φ = 39419820.

The previous prime is 40017137. The next prime is 40017161. The reversal of 40017157 is 75171004.

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 40017157 - 2²³ = 31628549 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 (40017137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298569 + ... + 298702.

It is an arithmetic number, because the mean of its divisors is an integer number (10153624).

Almost surely, 2^40017157 is an apocalyptic number.

It is an amenable number.

40017157 is a deficient number, since it is larger than the sum of its proper divisors (597339).

40017157 is an equidigital number, since it uses as much as digits as its factorization.

40017157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597338.

The product of its (nonzero) digits is 980, while the sum is 25.

The square root of 40017157 is about 6325.9115548670. The cubic root of 40017157 is about 342.0440791082.

The spelling of 40017157 in words is "forty million, seventeen thousand, one hundred fifty-seven".