157121343 has 16 divisors (see below), whose sum is σ = 233180160. Its totient is φ = 104564088.

The previous prime is 157121339. The next prime is 157121381. The reversal of 157121343 is 343121751.

It is not a de Polignac number, because 157121343 - 2² = 157121339 is a prime.

It is a super-2 number, since 2×157121343² = 49374232852247298, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157121323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11596 + ... + 21182.

It is an arithmetic number, because the mean of its divisors is an integer number (14573760).

Almost surely, 2^157121343 is an apocalyptic number.

157121343 is a deficient number, since it is larger than the sum of its proper divisors (76058817).

157121343 is an equidigital number, since it uses as much as digits as its factorization.

157121343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10203 (or 10197 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 157121343 is about 12534.8052637446. The cubic root of 157121343 is about 539.6080180012.

It can be divided in two parts, 157121 and 343, that added together give a cube (157464 = 54³).

The spelling of 157121343 in words is "one hundred fifty-seven million, one hundred twenty-one thousand, three hundred forty-three".