2521100149 has 4 divisors (see below), whose sum is σ = 2563830720. Its totient is φ = 2478369580.

The previous prime is 2521100143. The next prime is 2521100201. The reversal of 2521100149 is 9410011252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2521100149 is a prime.

It is a super-2 number, since 2×2521100149² = 12711891922575644402, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2521100143) 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, 21365197 + ... + 21365314.

It is an arithmetic number, because the mean of its divisors is an integer number (640957680).

Almost surely, 2^2521100149 is an apocalyptic number.

It is an amenable number.

2521100149 is a deficient number, since it is larger than the sum of its proper divisors (42730571).

2521100149 is an equidigital number, since it uses as much as digits as its factorization.

2521100149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42730570.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2521100149 is about 50210.5581426855. The cubic root of 2521100149 is about 1361.0164238809.

It can be divided in two parts, 252 and 1100149, that added together give a square (1100401 = 1049²).

The spelling of 2521100149 in words is "two billion, five hundred twenty-one million, one hundred thousand, one hundred forty-nine".