72274131 has 12 divisors (see below), whose sum is σ = 104510640. Its totient is φ = 48129840.

The previous prime is 72274127. The next prime is 72274151. The reversal of 72274131 is 13147227.

It is a happy number.

It is not a de Polignac number, because 72274131 - 2² = 72274127 is a prime.

It is a super-2 number, since 2×72274131² = 10447100023610322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72274095 and 72274104.

It is not an unprimeable number, because it can be changed into a prime (72274151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5385 + ... + 13173.

It is an arithmetic number, because the mean of its divisors is an integer number (8709220).

Almost surely, 2^72274131 is an apocalyptic number.

72274131 is a deficient number, since it is larger than the sum of its proper divisors (32236509).

72274131 is a wasteful number, since it uses less digits than its factorization.

72274131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8826 (or 8823 counting only the distinct ones).

The product of its digits is 2352, while the sum is 27.

The square root of 72274131 is about 8501.4193520847. The cubic root of 72274131 is about 416.5440732314.

The spelling of 72274131 in words is "seventy-two million, two hundred seventy-four thousand, one hundred thirty-one".