2591217372 has 12 divisors (see below), whose sum is σ = 6046173896. Its totient is φ = 863739120.

The previous prime is 2591217371. The next prime is 2591217389. The reversal of 2591217372 is 2737121952.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 2591217372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2591217371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 107967379 + ... + 107967402.

Almost surely, 2^2591217372 is an apocalyptic number.

It is an amenable number.

2591217372 is an abundant number, since it is smaller than the sum of its proper divisors (3454956524).

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

2591217372 is a wasteful number, since it uses less digits than its factorization.

2591217372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215934788 (or 215934786 counting only the distinct ones).

The product of its digits is 52920, while the sum is 39.

The square root of 2591217372 is about 50904.0015322961. The cubic root of 2591217372 is about 1373.5188232243.

The spelling of 2591217372 in words is "two billion, five hundred ninety-one million, two hundred seventeen thousand, three hundred seventy-two".