157017551 has 4 divisors (see below), whose sum is σ = 157130400. Its totient is φ = 156904704.

The previous prime is 157017533. The next prime is 157017557. The reversal of 157017551 is 155710751.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-157017551 is a prime.

It is a super-2 number, since 2×157017551² = 49309022644075202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157017557) 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, 54311 + ... + 57128.

It is an arithmetic number, because the mean of its divisors is an integer number (39282600).

Almost surely, 2^157017551 is an apocalyptic number.

157017551 is a deficient number, since it is larger than the sum of its proper divisors (112849).

157017551 is a wasteful number, since it uses less digits than its factorization.

157017551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112848.

The product of its (nonzero) digits is 6125, while the sum is 32.

The square root of 157017551 is about 12530.6644277149. The cubic root of 157017551 is about 539.4891728434.

The spelling of 157017551 in words is "one hundred fifty-seven million, seventeen thousand, five hundred fifty-one".