2501921911 has 2 divisors, whose sum is σ = 2501921912. Its totient is φ = 2501921910.

The previous prime is 2501921861. The next prime is 2501921921. The reversal of 2501921911 is 1191291052.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2501921911 is a prime.

It is a super-2 number, since 2×2501921911² = 12519226497483783842, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2501921921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1250960955 + 1250960956.

It is an arithmetic number, because the mean of its divisors is an integer number (1250960956).

Almost surely, 2^2501921911 is an apocalyptic number.

2501921911 is a deficient number, since it is larger than the sum of its proper divisors (1).

2501921911 is an equidigital number, since it uses as much as digits as its factorization.

2501921911 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 31.

The square root of 2501921911 is about 50019.2154176772. The cubic root of 2501921911 is about 1357.5565104840.

The spelling of 2501921911 in words is "two billion, five hundred one million, nine hundred twenty-one thousand, nine hundred eleven".