72266631 has 4 divisors (see below), whose sum is σ = 96355512. Its totient is φ = 48177752.

The previous prime is 72266627. The next prime is 72266653. The reversal of 72266631 is 13666227.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13666227 = 3 ⋅4555409.

It is a cyclic number.

It is not a de Polignac number, because 72266631 - 2² = 72266627 is a prime.

It is a super-2 number, since 2×72266631² = 10444931912180322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 72266592 and 72266601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72266431) 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, 12044436 + ... + 12044441.

It is an arithmetic number, because the mean of its divisors is an integer number (24088878).

Almost surely, 2^72266631 is an apocalyptic number.

72266631 is a deficient number, since it is larger than the sum of its proper divisors (24088881).

72266631 is a wasteful number, since it uses less digits than its factorization.

72266631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24088880.

The product of its digits is 18144, while the sum is 33.

The square root of 72266631 is about 8500.9782378265. The cubic root of 72266631 is about 416.5296642555.

The spelling of 72266631 in words is "seventy-two million, two hundred sixty-six thousand, six hundred thirty-one".