157293155 has 4 divisors (see below), whose sum is σ = 188751792. Its totient is φ = 125834520.

The previous prime is 157293131. The next prime is 157293167. The reversal of 157293155 is 551392751.

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

It is not a de Polignac number, because 157293155 - 2⁶ = 157293091 is a prime.

It is a super-2 number, since 2×157293155² = 49482273219708050, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

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, 15729311 + ... + 15729320.

It is an arithmetic number, because the mean of its divisors is an integer number (47187948).

Almost surely, 2^157293155 is an apocalyptic number.

157293155 is a deficient number, since it is larger than the sum of its proper divisors (31458637).

157293155 is an equidigital number, since it uses as much as digits as its factorization.

157293155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31458636.

The product of its digits is 47250, while the sum is 38.

The square root of 157293155 is about 12541.6567884789. The cubic root of 157293155 is about 539.8046332591.

The spelling of 157293155 in words is "one hundred fifty-seven million, two hundred ninety-three thousand, one hundred fifty-five".