213661030 has 64 divisors (see below), whose sum is σ = 443750400. Its totient is φ = 73307520.

The previous prime is 213660991. The next prime is 213661031. The reversal of 213661030 is 30166312.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 213660992 and 213661010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213661031) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 199336 + ... + 200404.

It is an arithmetic number, because the mean of its divisors is an integer number (6933600).

Almost surely, 2^213661030 is an apocalyptic number.

213661030 is an abundant number, since it is smaller than the sum of its proper divisors (230089370).

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

213661030 is a wasteful number, since it uses less digits than its factorization.

213661030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 213661030 is about 14617.1484907283. The cubic root of 213661030 is about 597.8264224799.

The spelling of 213661030 in words is "two hundred thirteen million, six hundred sixty-one thousand, thirty".