213110442 has 12 divisors (see below), whose sum is σ = 461739330. Its totient is φ = 71036808.

The previous prime is 213110437. The next prime is 213110449. The reversal of 213110442 is 244011312.

213110442 is a `hidden beast` number, since 213 + 1 + 10 + 442 = 666.

It can be written as a sum of positive squares in only one way, i.e., 156725361 + 56385081 = 12519^2 + 7509^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 11839469 = 213110442 / (2 + 1 + 3 + 1 + 1 + 0 + 4 + 4 + 2).

It is not an unprimeable number, because it can be changed into a prime (213110449) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5919717 + ... + 5919752.

Almost surely, 2^213110442 is an apocalyptic number.

213110442 is an abundant number, since it is smaller than the sum of its proper divisors (248628888).

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

213110442 is a wasteful number, since it uses less digits than its factorization.

213110442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11839477 (or 11839474 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 213110442 is about 14598.3027095618. The cubic root of 213110442 is about 597.3124632172.

Adding to 213110442 its reverse (244011312), we get a palindrome (457121754).

The spelling of 213110442 in words is "two hundred thirteen million, one hundred ten thousand, four hundred forty-two".