521869614 has 16 divisors (see below), whose sum is σ = 1192844928. Its totient is φ = 149105592.

The previous prime is 521869583. The next prime is 521869619. The reversal of 521869614 is 416968125.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 12425467 = 521869614 / (5 + 2 + 1 + 8 + 6 + 9 + 6 + 1 + 4).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (521869619) 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, 6212692 + ... + 6212775.

It is an arithmetic number, because the mean of its divisors is an integer number (74552808).

Almost surely, 2^521869614 is an apocalyptic number.

521869614 is an abundant number, since it is smaller than the sum of its proper divisors (670975314).

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

521869614 is a wasteful number, since it uses less digits than its factorization.

521869614 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12425479.

The product of its digits is 103680, while the sum is 42.

The square root of 521869614 is about 22844.4657192940. The cubic root of 521869614 is about 805.1077432527.

The spelling of 521869614 in words is "five hundred twenty-one million, eight hundred sixty-nine thousand, six hundred fourteen".