2521131366 has 64 divisors (see below), whose sum is σ = 5581255680. Its totient is φ = 754306560.

The previous prime is 2521131329. The next prime is 2521131367. The reversal of 2521131366 is 6631311252.

It is a super-2 number, since 2×2521131366² = 12712206729258051912, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521131367) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 806755 + ... + 809873.

It is an arithmetic number, because the mean of its divisors is an integer number (87207120).

Almost surely, 2^2521131366 is an apocalyptic number.

2521131366 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2521131366, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2790627840).

2521131366 is an abundant number, since it is smaller than the sum of its proper divisors (3060124314).

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

2521131366 is a wasteful number, since it uses less digits than its factorization.

2521131366 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3421.

The product of its digits is 6480, while the sum is 30.

The square root of 2521131366 is about 50210.8690026373. The cubic root of 2521131366 is about 1361.0220413590.

The spelling of 2521131366 in words is "two billion, five hundred twenty-one million, one hundred thirty-one thousand, three hundred sixty-six".