157172843 has 4 divisors (see below), whose sum is σ = 158938920. Its totient is φ = 155406768.

The previous prime is 157172819. The next prime is 157172861. The reversal of 157172843 is 348271751.

157172843 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 157172843 - 2¹² = 157168747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 157172797 and 157172806.

It is not an unprimeable number, because it can be changed into a prime (157172863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 882905 + ... + 883082.

It is an arithmetic number, because the mean of its divisors is an integer number (39734730).

Almost surely, 2^157172843 is an apocalyptic number.

157172843 is a deficient number, since it is larger than the sum of its proper divisors (1766077).

157172843 is an equidigital number, since it uses as much as digits as its factorization.

157172843 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766076.

The product of its digits is 47040, while the sum is 38.

The square root of 157172843 is about 12536.8593754576. The cubic root of 157172843 is about 539.6669677205. Note that the first 3 decimals are identical.

The spelling of 157172843 in words is "one hundred fifty-seven million, one hundred seventy-two thousand, eight hundred forty-three".