357214221 has 48 divisors (see below), whose sum is σ = 643202560. Its totient is φ = 186001920.

The previous prime is 357214213. The next prime is 357214229. The reversal of 357214221 is 122412753.

It is an interprime number because it is at equal distance from previous prime (357214213) and next prime (357214229).

It is not a de Polignac number, because 357214221 - 2³ = 357214213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (357214229) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 61941 + ... + 67461.

Almost surely, 2^357214221 is an apocalyptic number.

It is an amenable number.

357214221 is a deficient number, since it is larger than the sum of its proper divisors (285988339).

357214221 is a wasteful number, since it uses less digits than its factorization.

357214221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5626 (or 5623 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 357214221 is about 18900.1116663368. Note that the first 3 decimals coincide. The cubic root of 357214221 is about 709.5389594317.

Adding to 357214221 its reverse (122412753), we get a palindrome (479626974).

It can be divided in two parts, 357214 and 221, that added together give a triangular number (357435 = T₈₄₅).

The spelling of 357214221 in words is "three hundred fifty-seven million, two hundred fourteen thousand, two hundred twenty-one".