72101512 has 32 divisors (see below), whose sum is σ = 157043520. Its totient is φ = 30392640.

The previous prime is 72101503. The next prime is 72101537. The reversal of 72101512 is 21510127.

It is a super-2 number, since 2×72101512² = 10397256065372288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72101512.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7138 + ... + 13969.

It is an arithmetic number, because the mean of its divisors is an integer number (4907610).

Almost surely, 2^72101512 is an apocalyptic number.

It is an amenable number.

72101512 is an abundant number, since it is smaller than the sum of its proper divisors (84942008).

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

72101512 is a wasteful number, since it uses less digits than its factorization.

72101512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21181 (or 21177 counting only the distinct ones).

The product of its (nonzero) digits is 140, while the sum is 19.

The square root of 72101512 is about 8491.2609193217. The cubic root of 72101512 is about 416.2121852700.

Adding to 72101512 its reverse (21510127), we get a palindrome (93611639).

The spelling of 72101512 in words is "seventy-two million, one hundred one thousand, five hundred twelve".