213661602 has 48 divisors (see below), whose sum is σ = 577167552. Its totient is φ = 55496160.

The previous prime is 213661601. The next prime is 213661663. The reversal of 213661602 is 206166312.

213661602 is a `hidden beast` number, since 21 + 36 + 6 + 1 + 602 = 666.

It is not an unprimeable number, because it can be changed into a prime (213661601) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 75693 + ... + 78464.

It is an arithmetic number, because the mean of its divisors is an integer number (12024324).

Almost surely, 2^213661602 is an apocalyptic number.

213661602 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

213661602 is an abundant number, since it is smaller than the sum of its proper divisors (363505950).

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

213661602 is a wasteful number, since it uses less digits than its factorization.

213661602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154183 (or 154180 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 27.

The square root of 213661602 is about 14617.1680567749. The cubic root of 213661602 is about 597.8269559673.

The spelling of 213661602 in words is "two hundred thirteen million, six hundred sixty-one thousand, six hundred two".