131921751 has 16 divisors (see below), whose sum is σ = 200569824. Its totient is φ = 76406784.

The previous prime is 131921729. The next prime is 131921753. The reversal of 131921751 is 157129131.

It is not a de Polignac number, because 131921751 - 2⁷ = 131921623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131921753) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 98826 + ... + 100151.

It is an arithmetic number, because the mean of its divisors is an integer number (12535614).

Almost surely, 2^131921751 is an apocalyptic number.

131921751 is a deficient number, since it is larger than the sum of its proper divisors (68648073).

131921751 is a wasteful number, since it uses less digits than its factorization.

131921751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199010.

The product of its digits is 1890, while the sum is 30.

The square root of 131921751 is about 11485.7194376321. The cubic root of 131921751 is about 509.0637069775.

The spelling of 131921751 in words is "one hundred thirty-one million, nine hundred twenty-one thousand, seven hundred fifty-one".