513011421 has 64 divisors (see below), whose sum is σ = 856800000. Its totient is φ = 301190400.

The previous prime is 513011413. The next prime is 513011497. The reversal of 513011421 is 124110315.

It is not a de Polignac number, because 513011421 - 2³ = 513011413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 513011394 and 513011403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513011921) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1027830 + ... + 1028328.

It is an arithmetic number, because the mean of its divisors is an integer number (13387500).

Almost surely, 2^513011421 is an apocalyptic number.

It is an amenable number.

513011421 is a deficient number, since it is larger than the sum of its proper divisors (343788579).

513011421 is a wasteful number, since it uses less digits than its factorization.

513011421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651 (or 645 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 513011421 is about 22649.7554291432. The cubic root of 513011421 is about 800.5264352772.

Adding to 513011421 its reverse (124110315), we get a palindrome (637121736).

The spelling of 513011421 in words is "five hundred thirteen million, eleven thousand, four hundred twenty-one".