157293191 has 16 divisors (see below), whose sum is σ = 181872000. Its totient is φ = 134532000.

The previous prime is 157293167. The next prime is 157293211. The reversal of 157293191 is 191392751.

It is a cyclic number.

It is not a de Polignac number, because 157293191 - 2¹⁸ = 157031047 is a prime.

It is a super-2 number, since 2×157293191² = 49482295869924962, 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 (157293131) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 28616 + ... + 33666.

It is an arithmetic number, because the mean of its divisors is an integer number (11367000).

Almost surely, 2^157293191 is an apocalyptic number.

157293191 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

157293191 is a deficient number, since it is larger than the sum of its proper divisors (24578809).

157293191 is a wasteful number, since it uses less digits than its factorization.

157293191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5230.

The product of its digits is 17010, while the sum is 38.

The square root of 157293191 is about 12541.6582236959. The cubic root of 157293191 is about 539.8046744411.

The spelling of 157293191 in words is "one hundred fifty-seven million, two hundred ninety-three thousand, one hundred ninety-one".