521212342 has 16 divisors (see below), whose sum is σ = 902184192. Its totient is φ = 221207400.

The previous prime is 521212339. The next prime is 521212369. The reversal of 521212342 is 243212125.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179284 + ... + 182167.

It is an arithmetic number, because the mean of its divisors is an integer number (56386512).

Almost surely, 2^521212342 is an apocalyptic number.

521212342 is a deficient number, since it is larger than the sum of its proper divisors (380971850).

521212342 is a wasteful number, since it uses less digits than its factorization.

521212342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361563.

The product of its digits is 960, while the sum is 22.

The square root of 521212342 is about 22830.0753831432. The cubic root of 521212342 is about 804.7696019012.

Adding to 521212342 its reverse (243212125), we get a palindrome (764424467).

The spelling of 521212342 in words is "five hundred twenty-one million, two hundred twelve thousand, three hundred forty-two".