72277131 has 16 divisors (see below), whose sum is σ = 98271488. Its totient is φ = 47239200.

The previous prime is 72277087. The next prime is 72277141. The reversal of 72277131 is 13177227.

It is not a de Polignac number, because 72277131 - 2⁶ = 72277067 is a prime.

It is a super-2 number, since 2×72277131² = 10447967331182322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72277141) 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, 88716 + ... + 89526.

It is an arithmetic number, because the mean of its divisors is an integer number (6141968).

Almost surely, 2^72277131 is an apocalyptic number.

72277131 is a deficient number, since it is larger than the sum of its proper divisors (25994357).

72277131 is a wasteful number, since it uses less digits than its factorization.

72277131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362.

The product of its digits is 4116, while the sum is 30.

The square root of 72277131 is about 8501.5957913794. The cubic root of 72277131 is about 416.5498365426.

The spelling of 72277131 in words is "seventy-two million, two hundred seventy-seven thousand, one hundred thirty-one".