157275431 has 4 divisors (see below), whose sum is σ = 162348864. Its totient is φ = 152202000.

The previous prime is 157275427. The next prime is 157275451. The reversal of 157275431 is 134572751.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 134572751 = 4639 ⋅29009.

It is a cyclic number.

It is not a de Polignac number, because 157275431 - 2² = 157275427 is a prime.

It is a super-2 number, since 2×157275431² = 49471122392471522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157275391 and 157275400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157275451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2536670 + ... + 2536731.

It is an arithmetic number, because the mean of its divisors is an integer number (40587216).

Almost surely, 2^157275431 is an apocalyptic number.

157275431 is a deficient number, since it is larger than the sum of its proper divisors (5073433).

157275431 is an equidigital number, since it uses as much as digits as its factorization.

157275431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5073432.

The product of its digits is 29400, while the sum is 35.

The square root of 157275431 is about 12540.9501633648. The cubic root of 157275431 is about 539.7843571983.

The spelling of 157275431 in words is "one hundred fifty-seven million, two hundred seventy-five thousand, four hundred thirty-one".