213783357 has 4 divisors (see below), whose sum is σ = 285044480. Its totient is φ = 142522236.

The previous prime is 213783329. The next prime is 213783371. The reversal of 213783357 is 753387312.

It is a happy number.

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 not a de Polignac number, because 213783357 - 2⁶ = 213783293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213783257) 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, 35630557 + ... + 35630562.

It is an arithmetic number, because the mean of its divisors is an integer number (71261120).

Almost surely, 2^213783357 is an apocalyptic number.

It is an amenable number.

213783357 is a deficient number, since it is larger than the sum of its proper divisors (71261123).

213783357 is an equidigital number, since it uses as much as digits as its factorization.

213783357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71261122.

The product of its digits is 105840, while the sum is 39.

The square root of 213783357 is about 14621.3322580400. The cubic root of 213783357 is about 597.9404915747.

The spelling of 213783357 in words is "two hundred thirteen million, seven hundred eighty-three thousand, three hundred fifty-seven".