213656502 has 16 divisors (see below), whose sum is σ = 427743792. Its totient is φ = 71147040.

The previous prime is 213656497. The next prime is 213656503. The reversal of 213656502 is 205656312.

It is a self number, because there is not a number n which added to its sum of digits gives 213656502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213656503) 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, 11313 + ... + 23564.

It is an arithmetic number, because the mean of its divisors is an integer number (26733987).

Almost surely, 2^213656502 is an apocalyptic number.

213656502 is an abundant number, since it is smaller than the sum of its proper divisors (214087290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

213656502 is a wasteful number, since it uses less digits than its factorization.

213656502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35903.

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 213656502 is about 14616.9936033372. The cubic root of 213656502 is about 597.8221993152.

The spelling of 213656502 in words is "two hundred thirteen million, six hundred fifty-six thousand, five hundred two".