131818951 has 8 divisors (see below), whose sum is σ = 147147264. Its totient is φ = 117048120.

The previous prime is 131818943. The next prime is 131818961. The reversal of 131818951 is 159818131.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 131818951 - 2³ = 131818943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 131818951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131818931) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 138871 + ... + 139816.

It is an arithmetic number, because the mean of its divisors is an integer number (18393408).

Almost surely, 2^131818951 is an apocalyptic number.

131818951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

131818951 is a deficient number, since it is larger than the sum of its proper divisors (15328313).

131818951 is a wasteful number, since it uses less digits than its factorization.

131818951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278741.

The product of its digits is 8640, while the sum is 37.

The square root of 131818951 is about 11481.2434431119. The cubic root of 131818951 is about 508.9314433496.

The spelling of 131818951 in words is "one hundred thirty-one million, eight hundred eighteen thousand, nine hundred fifty-one".