72215324 has 12 divisors (see below), whose sum is σ = 126723744. Its totient is φ = 36008544.

The previous prime is 72215293. The next prime is 72215327. The reversal of 72215324 is 42351227.

It is a junction number, because it is equal to n+sod(n) for n = 72215293 and 72215302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72215327) 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, 23129 + ... + 26064.

It is an arithmetic number, because the mean of its divisors is an integer number (10560312).

Almost surely, 2^72215324 is an apocalyptic number.

It is an amenable number.

72215324 is a deficient number, since it is larger than the sum of its proper divisors (54508420).

72215324 is a wasteful number, since it uses less digits than its factorization.

72215324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49564 (or 49562 counting only the distinct ones).

The product of its digits is 3360, while the sum is 26.

The square root of 72215324 is about 8497.9599904918. The cubic root of 72215324 is about 416.4310666652.

The spelling of 72215324 in words is "seventy-two million, two hundred fifteen thousand, three hundred twenty-four".