513133166131 has 4 divisors (see below), whose sum is σ = 516878663832. Its totient is φ = 509387668432.

The previous prime is 513133166123. The next prime is 513133166153. The reversal of 513133166131 is 131661331315.

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

It is a cyclic number.

It is not a de Polignac number, because 513133166131 - 2³ = 513133166123 is a prime.

It is a super-2 number, since 2×513133166131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (513133166531) 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, 1872748645 + ... + 1872748918.

It is an arithmetic number, because the mean of its divisors is an integer number (129219665958).

Almost surely, 2^513133166131 is an apocalyptic number.

513133166131 is a deficient number, since it is larger than the sum of its proper divisors (3745497701).

513133166131 is a wasteful number, since it uses less digits than its factorization.

513133166131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3745497700.

The product of its digits is 14580, while the sum is 34.

Adding to 513133166131 its reverse (131661331315), we get a palindrome (644794497446).

The spelling of 513133166131 in words is "five hundred thirteen billion, one hundred thirty-three million, one hundred sixty-six thousand, one hundred thirty-one".