521899402 has 8 divisors (see below), whose sum is σ = 783278496. Its totient is φ = 260806572.

The previous prime is 521899387. The next prime is 521899403. The reversal of 521899402 is 204998125.

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

It is not an unprimeable number, because it can be changed into a prime (521899403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66948 + ... + 74335.

It is an arithmetic number, because the mean of its divisors is an integer number (97909812).

Almost surely, 2^521899402 is an apocalyptic number.

521899402 is a deficient number, since it is larger than the sum of its proper divisors (261379094).

521899402 is a wasteful number, since it uses less digits than its factorization.

521899402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143132.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 521899402 is about 22845.1176840917. The cubic root of 521899402 is about 805.1230613146.

The spelling of 521899402 in words is "five hundred twenty-one million, eight hundred ninety-nine thousand, four hundred two".