157551 has 4 divisors (see below), whose sum is σ = 210072. Its totient is φ = 105032.

The previous prime is 157543. The next prime is 157559. The reversal of 157551 is 155751.

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

It is an interprime number because it is at equal distance from previous prime (157543) and next prime (157559).

It is a cyclic number.

It is not a de Polignac number, because 157551 - 2³ = 157543 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157559) 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, 26256 + ... + 26261.

It is an arithmetic number, because the mean of its divisors is an integer number (52518).

2¹⁵⁷⁵⁵¹ is an apocalyptic number.

157551 is a deficient number, since it is larger than the sum of its proper divisors (52521).

157551 is an equidigital number, since it uses as much as digits as its factorization.

157551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52520.

The product of its digits is 875, while the sum is 24.

The square root of 157551 is about 396.9269454194. The cubic root of 157551 is about 54.0099432993.

The spelling of 157551 in words is "one hundred fifty-seven thousand, five hundred fifty-one".