521497470 has 32 divisors (see below), whose sum is σ = 1347871392. Its totient is φ = 128368512.

The previous prime is 521497447. The next prime is 521497481. The reversal of 521497470 is 74794125.

It is a super-2 number, since 2×521497470² = 543919222432801800, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 668197 + ... + 668976.

It is an arithmetic number, because the mean of its divisors is an integer number (42120981).

Almost surely, 2^521497470 is an apocalyptic number.

521497470 is an abundant number, since it is smaller than the sum of its proper divisors (826373922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

521497470 is a wasteful number, since it uses less digits than its factorization.

521497470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1337196.

The product of its (nonzero) digits is 70560, while the sum is 39.

The square root of 521497470 is about 22836.3190991893. The cubic root of 521497470 is about 804.9163242630.

The spelling of 521497470 in words is "five hundred twenty-one million, four hundred ninety-seven thousand, four hundred seventy".