157783213 has 4 divisors (see below), whose sum is σ = 180323680. Its totient is φ = 135242748.

The previous prime is 157783193. The next prime is 157783231. The reversal of 157783213 is 312387751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157783213 - 2⁵ = 157783181 is a prime.

It is a super-3 number, since 3×157783213³ (a number of 26 digits) contains 333 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 (157783253) 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, 11270223 + ... + 11270236.

It is an arithmetic number, because the mean of its divisors is an integer number (45080920).

Almost surely, 2^157783213 is an apocalyptic number.

It is an amenable number.

157783213 is a deficient number, since it is larger than the sum of its proper divisors (22540467).

157783213 is an equidigital number, since it uses as much as digits as its factorization.

157783213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22540466.

The product of its digits is 35280, while the sum is 37.

The square root of 157783213 is about 12561.1788061471. The cubic root of 157783213 is about 540.3646519643.

The spelling of 157783213 in words is "one hundred fifty-seven million, seven hundred eighty-three thousand, two hundred thirteen".