2521131860 has 72 divisors (see below), whose sum is σ = 5787373536. Its totient is φ = 922047360.

The previous prime is 2521131859. The next prime is 2521131883. The reversal of 2521131860 is 681311252.

It is a super-2 number, since 2×2521131860² = 12712211711014119200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 358175 + ... + 365145.

It is an arithmetic number, because the mean of its divisors is an integer number (80380188).

Almost surely, 2^2521131860 is an apocalyptic number.

2521131860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2521131860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2893686768).

2521131860 is an abundant number, since it is smaller than the sum of its proper divisors (3266241676).

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

2521131860 is a wasteful number, since it uses less digits than its factorization.

2521131860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7113 (or 7098 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 2521131860 is about 50210.8739218907. The cubic root of 2521131860 is about 1361.0221302536.

The spelling of 2521131860 in words is "two billion, five hundred twenty-one million, one hundred thirty-one thousand, eight hundred sixty".