513392121 has 16 divisors (see below), whose sum is σ = 829725120. Its totient is φ = 311146560.

The previous prime is 513392069. The next prime is 513392167. The reversal of 513392121 is 121293315.

It is not a de Polignac number, because 513392121 - 2¹³ = 513383929 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (513392171) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 864000 + ... + 864593.

It is an arithmetic number, because the mean of its divisors is an integer number (51857820).

Almost surely, 2^513392121 is an apocalyptic number.

It is an amenable number.

513392121 is a deficient number, since it is larger than the sum of its proper divisors (316332999).

513392121 is a wasteful number, since it uses less digits than its factorization.

513392121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728613 (or 1728607 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 513392121 is about 22658.1579348366. The cubic root of 513392121 is about 800.7244068662.

The spelling of 513392121 in words is "five hundred thirteen million, three hundred ninety-two thousand, one hundred twenty-one".