521098540 has 24 divisors (see below), whose sum is σ = 1094884560. Its totient is φ = 208329408.

The previous prime is 521098537. The next prime is 521098549. The reversal of 521098540 is 45890125.

It is a junction number, because it is equal to n+sod(n) for n = 521098496 and 521098505.

It is not an unprimeable number, because it can be changed into a prime (521098549) 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, 39639 + ... + 51121.

It is an arithmetic number, because the mean of its divisors is an integer number (45620190).

Almost surely, 2^521098540 is an apocalyptic number.

It is an amenable number.

521098540 is an abundant number, since it is smaller than the sum of its proper divisors (573786020).

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

521098540 is a wasteful number, since it uses less digits than its factorization.

521098540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13761 (or 13759 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 34.

The square root of 521098540 is about 22827.5828768619. The cubic root of 521098540 is about 804.7110262503.

The spelling of 521098540 in words is "five hundred twenty-one million, ninety-eight thousand, five hundred forty".