2506121553 has 16 divisors (see below), whose sum is σ = 3611926080. Its totient is φ = 1536489024.

The previous prime is 2506121549. The next prime is 2506121557. The reversal of 2506121553 is 3551216052.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2506121549) and next prime (2506121557).

It is not a de Polignac number, because 2506121553 - 2² = 2506121549 is a prime.

It is a super-2 number, since 2×2506121553² = 12561290476822263618, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2506121553.

It is not an unprimeable number, because it can be changed into a prime (2506121557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108951 + ... + 129932.

It is an arithmetic number, because the mean of its divisors is an integer number (225745380).

Almost surely, 2^2506121553 is an apocalyptic number.

It is an amenable number.

2506121553 is a deficient number, since it is larger than the sum of its proper divisors (1105804527).

2506121553 is a wasteful number, since it uses less digits than its factorization.

2506121553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239168.

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 2506121553 is about 50061.1781023979. The cubic root of 2506121553 is about 1358.3156687814.

The spelling of 2506121553 in words is "two billion, five hundred six million, one hundred twenty-one thousand, five hundred fifty-three".