521245802 has 16 divisors (see below), whose sum is σ = 974797632. Its totient is φ = 203082720.

The previous prime is 521245787. The next prime is 521245807. The reversal of 521245802 is 208542125.

It is a super-2 number, since 2×521245802² = 543394372205246408, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (521245807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1692203 + ... + 1692510.

It is an arithmetic number, because the mean of its divisors is an integer number (60924852).

Almost surely, 2^521245802 is an apocalyptic number.

521245802 is a deficient number, since it is larger than the sum of its proper divisors (453551830).

521245802 is a wasteful number, since it uses less digits than its factorization.

521245802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384733.

The product of its (nonzero) digits is 6400, while the sum is 29.

The square root of 521245802 is about 22830.8081766722. The cubic root of 521245802 is about 804.7868226591.

Adding to 521245802 its reverse (208542125), we get a palindrome (729787927).

The spelling of 521245802 in words is "five hundred twenty-one million, two hundred forty-five thousand, eight hundred two".