157921143 has 16 divisors (see below), whose sum is σ = 228975840. Its totient is φ = 96408576.

The previous prime is 157921117. The next prime is 157921171. The reversal of 157921143 is 341129751.

It is not a de Polignac number, because 157921143 - 2¹⁷ = 157790071 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157921343) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39958 + ... + 43731.

It is an arithmetic number, because the mean of its divisors is an integer number (14310990).

Almost surely, 2^157921143 is an apocalyptic number.

157921143 is a deficient number, since it is larger than the sum of its proper divisors (71054697).

157921143 is a wasteful number, since it uses less digits than its factorization.

157921143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83746.

The product of its digits is 7560, while the sum is 33.

The square root of 157921143 is about 12566.6679354553. The cubic root of 157921143 is about 540.5220637013.

It can be divided in two parts, 1579 and 21143, that added together give a palindrome (22722).

The spelling of 157921143 in words is "one hundred fifty-seven million, nine hundred twenty-one thousand, one hundred forty-three".