521142302 has 32 divisors (see below), whose sum is σ = 825876480. Its totient is φ = 246317760.

The previous prime is 521142283. The next prime is 521142311. The reversal of 521142302 is 203241125.

It is a congruent number.

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, 503978 + ... + 505010.

It is an arithmetic number, because the mean of its divisors is an integer number (25808640).

Almost surely, 2^521142302 is an apocalyptic number.

521142302 is a deficient number, since it is larger than the sum of its proper divisors (304734178).

521142302 is a wasteful number, since it uses less digits than its factorization.

521142302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 521142302 is about 22828.5413901108. The cubic root of 521142302 is about 804.7335522382.

Adding to 521142302 its reverse (203241125), we get a palindrome (724383427).

The spelling of 521142302 in words is "five hundred twenty-one million, one hundred forty-two thousand, three hundred two".