131120651 has 4 divisors (see below), whose sum is σ = 132121704. Its totient is φ = 130119600.

The previous prime is 131120617. The next prime is 131120657. The reversal of 131120651 is 156021131.

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-131120651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131120657) 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, 500330 + ... + 500591.

It is an arithmetic number, because the mean of its divisors is an integer number (33030426).

Almost surely, 2^131120651 is an apocalyptic number.

131120651 is a deficient number, since it is larger than the sum of its proper divisors (1001053).

131120651 is a wasteful number, since it uses less digits than its factorization.

131120651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1001052.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 131120651 is about 11450.7925926549. The cubic root of 131120651 is about 508.0311776905.

Adding to 131120651 its reverse (156021131), we get a palindrome (287141782).

The spelling of 131120651 in words is "one hundred thirty-one million, one hundred twenty thousand, six hundred fifty-one".