71613120 has 56 divisors (see below), whose sum is σ = 227374704. Its totient is φ = 19096576.

The previous prime is 71613097. The next prime is 71613127. The reversal of 71613120 is 2131617.

It is a super-2 number, since 2×71613120² = 10256877912268800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (71613127) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36339 + ... + 38258.

Almost surely, 2^71613120 is an apocalyptic number.

It is an amenable number.

71613120 is an abundant number, since it is smaller than the sum of its proper divisors (155761584).

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

71613120 is a wasteful number, since it uses less digits than its factorization.

71613120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74617 (or 74607 counting only the distinct ones).

The product of its (nonzero) digits is 252, while the sum is 21.

The square root of 71613120 is about 8462.4535449242. The cubic root of 71613120 is about 415.2702937478.

Adding to 71613120 its reverse (2131617), we get a palindrome (73744737).

The spelling of 71613120 in words is "seventy-one million, six hundred thirteen thousand, one hundred twenty".