15800157 has 32 divisors (see below), whose sum is σ = 25660800. Its totient is φ = 9563904.

The previous prime is 15800143. The next prime is 15800167. The reversal of 15800157 is 75100851.

It is not a de Polignac number, because 15800157 - 2¹¹ = 15798109 is a prime.

It is a super-2 number, since 2×15800157² = 499289922449298, which contains 22 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 15800157.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15800107) 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, 12718 + ... + 13904.

It is an arithmetic number, because the mean of its divisors is an integer number (801900).

Almost surely, 2^15800157 is an apocalyptic number.

15800157 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

15800157 is a deficient number, since it is larger than the sum of its proper divisors (9860643).

15800157 is a wasteful number, since it uses less digits than its factorization.

15800157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1242 (or 1236 counting only the distinct ones).

The product of its (nonzero) digits is 1400, while the sum is 27.

The square root of 15800157 is about 3974.9411316396. The cubic root of 15800157 is about 250.9307015456.

The spelling of 15800157 in words is "fifteen million, eight hundred thousand, one hundred fifty-seven".