2115553551 has 16 divisors (see below), whose sum is σ = 2931890304. Its totient is φ = 1355711904.

The previous prime is 2115553529. The next prime is 2115553577. The reversal of 2115553551 is 1553555112.

It is not a de Polignac number, because 2115553551 - 2⁶ = 2115553487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2115553511) 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, 105601 + ... + 124026.

It is an arithmetic number, because the mean of its divisors is an integer number (183243144).

Almost surely, 2^2115553551 is an apocalyptic number.

2115553551 is a deficient number, since it is larger than the sum of its proper divisors (816336753).

2115553551 is a wasteful number, since it uses less digits than its factorization.

2115553551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229750.

The product of its digits is 18750, while the sum is 33.

The square root of 2115553551 is about 45995.1470374865. The cubic root of 2115553551 is about 1283.7329081435.

The spelling of 2115553551 in words is "two billion, one hundred fifteen million, five hundred fifty-three thousand, five hundred fifty-one".