513121432 has 32 divisors (see below), whose sum is σ = 981000000. Its totient is φ = 251566848.

The previous prime is 513121409. The next prime is 513121463. The reversal of 513121432 is 234121315.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91444 + ... + 96892.

It is an arithmetic number, because the mean of its divisors is an integer number (30656250).

Almost surely, 2^513121432 is an apocalyptic number.

It is an amenable number.

513121432 is a deficient number, since it is larger than the sum of its proper divisors (467878568).

513121432 is a wasteful number, since it uses less digits than its factorization.

513121432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5683 (or 5679 counting only the distinct ones).

The product of its digits is 720, while the sum is 22.

The square root of 513121432 is about 22652.1838240820. The cubic root of 513121432 is about 800.5836532492.

Adding to 513121432 its reverse (234121315), we get a palindrome (747242747).

The spelling of 513121432 in words is "five hundred thirteen million, one hundred twenty-one thousand, four hundred thirty-two".