2513881 has 2 divisors, whose sum is σ = 2513882. Its totient is φ = 2513880.

The previous prime is 2513839. The next prime is 2513887. The reversal of 2513881 is 1883152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1392400 + 1121481 = 1180^2 + 1059^2 .

It is a cyclic number.

It is not a de Polignac number, because 2513881 - 2¹⁵ = 2481113 is a prime.

It is a super-2 number, since 2×2513881² = 12639195364322, which contains 22 as substring.

2513881 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (2513887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1256940 + 1256941.

It is an arithmetic number, because the mean of its divisors is an integer number (1256941).

2^2513881 is an apocalyptic number.

It is an amenable number.

2513881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2513881 is an equidigital number, since it uses as much as digits as its factorization.

2513881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 28.

The square root of 2513881 is about 1585.5223114167. The cubic root of 2513881 is about 135.9716095582.

The spelling of 2513881 in words is "two million, five hundred thirteen thousand, eight hundred eighty-one".