724221132 has 36 divisors (see below), whose sum is σ = 1746146808. Its totient is φ = 233616000.

The previous prime is 724221037. The next prime is 724221133. The reversal of 724221132 is 231122427.

It is a super-2 number, since 2×724221132² = 1048992496070722848, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (724221133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19869 + ... + 42932.

It is an arithmetic number, because the mean of its divisors is an integer number (48504078).

Almost surely, 2^724221132 is an apocalyptic number.

It is an amenable number.

724221132 is an abundant number, since it is smaller than the sum of its proper divisors (1021925676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

724221132 is a wasteful number, since it uses less digits than its factorization.

724221132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62870 (or 62837 counting only the distinct ones).

The product of its digits is 1344, while the sum is 24.

The square root of 724221132 is about 26911.3569334584. The cubic root of 724221132 is about 898.0290746419.

Adding to 724221132 its reverse (231122427), we get a palindrome (955343559).

The spelling of 724221132 in words is "seven hundred twenty-four million, two hundred twenty-one thousand, one hundred thirty-two".