513131405 has 8 divisors (see below), whose sum is σ = 615929184. Its totient is φ = 410390800.

The previous prime is 513131393. The next prime is 513131407. The reversal of 513131405 is 504131315.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 513131405 - 2¹⁶ = 513065869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513131407) 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, 8870 + ... + 33240.

It is an arithmetic number, because the mean of its divisors is an integer number (76991148).

Almost surely, 2^513131405 is an apocalyptic number.

It is an amenable number.

513131405 is a deficient number, since it is larger than the sum of its proper divisors (102797779).

513131405 is a wasteful number, since it uses less digits than its factorization.

513131405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28587.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 513131405 is about 22652.4039563133. The cubic root of 513131405 is about 800.5888399156.

The spelling of 513131405 in words is "five hundred thirteen million, one hundred thirty-one thousand, four hundred five".