2215139472 has 720 divisors, whose sum is σ = 8644446720. Its totient is φ = 522547200.

The previous prime is 2215139471. The next prime is 2215139489. The reversal of 2215139472 is 2749315122.

2215139472 is a `hidden beast` number, since 2 + 2 + 151 + 39 + 472 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2215139471) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 54027772 + ... + 54027812.

It is an arithmetic number, because the mean of its divisors is an integer number (12006176).

Almost surely, 2^2215139472 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2215139472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4322223360).

2215139472 is an abundant number, since it is smaller than the sum of its proper divisors (6429307248).

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

2215139472 is a wasteful number, since it uses less digits than its factorization.

2215139472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 116 counting only the distinct ones).

The product of its digits is 30240, while the sum is 36.

The square root of 2215139472 is about 47065.2682134076. The cubic root of 2215139472 is about 1303.5680033629.

The spelling of 2215139472 in words is "two billion, two hundred fifteen million, one hundred thirty-nine thousand, four hundred seventy-two".