72215469 has 56 divisors (see below), whose sum is σ = 116470080. Its totient is φ = 44649792.

The previous prime is 72215467. The next prime is 72215489. The reversal of 72215469 is 96451227.

It is not a de Polignac number, because 72215469 - 2¹ = 72215467 is a prime.

It is a super-2 number, since 2×72215469² = 10430147925779922, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72215467) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 989217 + ... + 989289.

Almost surely, 2^72215469 is an apocalyptic number.

It is an amenable number.

72215469 is a deficient number, since it is larger than the sum of its proper divisors (44254611).

72215469 is an equidigital number, since it uses as much as digits as its factorization.

72215469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173 (or 158 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 72215469 is about 8497.9685219469. The cubic root of 72215469 is about 416.4313453801.

The spelling of 72215469 in words is "seventy-two million, two hundred fifteen thousand, four hundred sixty-nine".