521563142 has 8 divisors (see below), whose sum is σ = 797106096. Its totient is φ = 255861112.

The previous prime is 521563123. The next prime is 521563153. The reversal of 521563142 is 241365125.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×521563142² = 544056222185824328, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2460098 + ... + 2460309.

It is an arithmetic number, because the mean of its divisors is an integer number (99638262).

Almost surely, 2^521563142 is an apocalyptic number.

521563142 is a deficient number, since it is larger than the sum of its proper divisors (275542954).

521563142 is a wasteful number, since it uses less digits than its factorization.

521563142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4920462.

The product of its digits is 7200, while the sum is 29.

The square root of 521563142 is about 22837.7569388940. The cubic root of 521563142 is about 804.9501104583.

The spelling of 521563142 in words is "five hundred twenty-one million, five hundred sixty-three thousand, one hundred forty-two".