72471512 has 32 divisors (see below), whose sum is σ = 139898880. Its totient is φ = 35175840.

The previous prime is 72471479. The next prime is 72471523. The reversal of 72471512 is 21517427.

It is a super-2 number, since 2×72471512² = 10504240103132288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (29) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65153 + ... + 66255.

It is an arithmetic number, because the mean of its divisors is an integer number (4371840).

Almost surely, 2^72471512 is an apocalyptic number.

It is an amenable number.

72471512 is a deficient number, since it is larger than the sum of its proper divisors (67427368).

72471512 is a wasteful number, since it uses less digits than its factorization.

72471512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343 (or 1339 counting only the distinct ones).

The product of its digits is 3920, while the sum is 29.

The square root of 72471512 is about 8513.0201456357. The cubic root of 72471512 is about 416.9229231837.

Adding to 72471512 its reverse (21517427), we get a palindrome (93988939).

The spelling of 72471512 in words is "seventy-two million, four hundred seventy-one thousand, five hundred twelve".