131151222 has 24 divisors (see below), whose sum is σ = 284441976. Its totient is φ = 43673856.

The previous prime is 131151217. The next prime is 131151233. The reversal of 131151222 is 222151131.

131151222 is a `hidden beast` number, since 131 + 1 + 512 + 22 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 131151195 and 131151204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 18913 + ... + 24899.

It is an arithmetic number, because the mean of its divisors is an integer number (11851749).

Almost surely, 2^131151222 is an apocalyptic number.

131151222 is an abundant number, since it is smaller than the sum of its proper divisors (153290754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

131151222 is a wasteful number, since it uses less digits than its factorization.

131151222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7212 (or 7209 counting only the distinct ones).

The product of its digits is 120, while the sum is 18.

The square root of 131151222 is about 11452.1274006186. The cubic root of 131151222 is about 508.0706573965.

Subtracting 131151222 from its reverse (222151131), we obtain a palindrome (90999909).

The spelling of 131151222 in words is "one hundred thirty-one million, one hundred fifty-one thousand, two hundred twenty-two".