157193813 has 16 divisors (see below), whose sum is σ = 186796800. Its totient is φ = 132180048.

The previous prime is 157193809. The next prime is 157193819. The reversal of 157193813 is 318391751.

It is not a de Polignac number, because 157193813 - 2² = 157193809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157193819) 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, 13856 + ... + 22502.

It is an arithmetic number, because the mean of its divisors is an integer number (11674800).

Almost surely, 2^157193813 is an apocalyptic number.

It is an amenable number.

157193813 is a deficient number, since it is larger than the sum of its proper divisors (29602987).

157193813 is an frugal number, since it uses more digits than its factorization.

157193813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8721 (or 8707 counting only the distinct ones).

The product of its digits is 22680, while the sum is 38.

The square root of 157193813 is about 12537.6956814241. The cubic root of 157193813 is about 539.6909674414.

The spelling of 157193813 in words is "one hundred fifty-seven million, one hundred ninety-three thousand, eight hundred thirteen".