131665151 has 4 divisors (see below), whose sum is σ = 131719704. Its totient is φ = 131610600.

The previous prime is 131665123. The next prime is 131665201. The reversal of 131665151 is 151566131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 151566131 = 1381 ⋅109751.

It is a cyclic number.

It is not a de Polignac number, because 131665151 - 2¹⁸ = 131403007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131665111) 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, 23480 + ... + 28541.

It is an arithmetic number, because the mean of its divisors is an integer number (32929926).

Almost surely, 2^131665151 is an apocalyptic number.

131665151 is a deficient number, since it is larger than the sum of its proper divisors (54553).

131665151 is an equidigital number, since it uses as much as digits as its factorization.

131665151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54552.

The product of its digits is 2700, while the sum is 29.

The square root of 131665151 is about 11474.5436074817. The cubic root of 131665151 is about 508.7334340924.

The spelling of 131665151 in words is "one hundred thirty-one million, six hundred sixty-five thousand, one hundred fifty-one".