130511251 has 4 divisors (see below), whose sum is σ = 140550592. Its totient is φ = 120471912.

The previous prime is 130511233. The next prime is 130511257. The reversal of 130511251 is 152115031.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130511251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (130511257) 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, 5019651 + ... + 5019676.

It is an arithmetic number, because the mean of its divisors is an integer number (35137648).

Almost surely, 2^130511251 is an apocalyptic number.

130511251 is a deficient number, since it is larger than the sum of its proper divisors (10039341).

130511251 is a wasteful number, since it uses less digits than its factorization.

130511251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10039340.

The product of its (nonzero) digits is 150, while the sum is 19.

The square root of 130511251 is about 11424.1520910744. The cubic root of 130511251 is about 507.2429086020.

Adding to 130511251 its reverse (152115031), we get a palindrome (282626282).

The spelling of 130511251 in words is "one hundred thirty million, five hundred eleven thousand, two hundred fifty-one".