213502690 has 16 divisors (see below), whose sum is σ = 386259192. Its totient is φ = 84966784.

The previous prime is 213502687. The next prime is 213502693. The reversal of 213502690 is 96205312.

It is an interprime number because it is at equal distance from previous prime (213502687) and next prime (213502693).

It can be written as a sum of positive squares in 4 ways, for example, as 167003929 + 46498761 = 12923^2 + 6819^2 .

It is a super-2 number, since 2×213502690² = 91166797274472200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (213502693) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52219 + ... + 56158.

Almost surely, 2^213502690 is an apocalyptic number.

213502690 is a deficient number, since it is larger than the sum of its proper divisors (172756502).

213502690 is a wasteful number, since it uses less digits than its factorization.

213502690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108581.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 213502690 is about 14611.7312458175. The cubic root of 213502690 is about 597.6787068376.

The spelling of 213502690 in words is "two hundred thirteen million, five hundred two thousand, six hundred ninety".