213630837192 has 96 divisors (see below), whose sum is σ = 592017075000. Its totient is φ = 69572597760.

The previous prime is 213630837157. The next prime is 213630837193. The reversal of 213630837192 is 291738036312.

213630837192 is a `hidden beast` number, since 2 + 1 + 3 + 630 + 8 + 3 + 7 + 1 + 9 + 2 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 37235877156 + 176394960036 = 192966^2 + 419994^2 .

It is not an unprimeable number, because it can be changed into a prime (213630837193) 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, 491184 + ... + 817632.

Almost surely, 2^213630837192 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 213630837192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296008537500).

213630837192 is an abundant number, since it is smaller than the sum of its proper divisors (378386237808).

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

213630837192 is a wasteful number, since it uses less digits than its factorization.

213630837192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 326671 (or 326664 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The spelling of 213630837192 in words is "two hundred thirteen billion, six hundred thirty million, eight hundred thirty-seven thousand, one hundred ninety-two".