210531353442 has 32 divisors (see below), whose sum is σ = 434686930944. Its totient is φ = 67906846800.

The previous prime is 210531353401. The next prime is 210531353477. The reversal of 210531353442 is 244353135012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2133723 + ... + 2230209.

It is an arithmetic number, because the mean of its divisors is an integer number (13583966592).

Almost surely, 2^210531353442 is an apocalyptic number.

210531353442 is an abundant number, since it is smaller than the sum of its proper divisors (224155577502).

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

210531353442 is a wasteful number, since it uses less digits than its factorization.

210531353442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108254.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 210531353442 its reverse (244353135012), we get a palindrome (454884488454).

The spelling of 210531353442 in words is "two hundred ten billion, five hundred thirty-one million, three hundred fifty-three thousand, four hundred forty-two".