513231051 has 4 divisors (see below), whose sum is σ = 684308072. Its totient is φ = 342154032.

The previous prime is 513231001. The next prime is 513231079. The reversal of 513231051 is 150132315.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 513231051 - 2⁷ = 513230923 is a prime.

It is a super-2 number, since 2×513231051² = 526812223421129202, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513231001) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 85538506 + ... + 85538511.

It is an arithmetic number, because the mean of its divisors is an integer number (171077018).

Almost surely, 2^513231051 is an apocalyptic number.

513231051 is a deficient number, since it is larger than the sum of its proper divisors (171077021).

513231051 is a wasteful number, since it uses less digits than its factorization.

513231051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 171077020.

The product of its (nonzero) digits is 450, while the sum is 21.

The square root of 513231051 is about 22654.6033070544. The cubic root of 513231051 is about 800.6406592036.

Adding to 513231051 its reverse (150132315), we get a palindrome (663363366).

The spelling of 513231051 in words is "five hundred thirteen million, two hundred thirty-one thousand, fifty-one".