2251555123 has 16 divisors (see below), whose sum is σ = 2490310656. Its totient is φ = 2024809600.

The previous prime is 2251555093. The next prime is 2251555127. The reversal of 2251555123 is 3215551522.

It is not a de Polignac number, because 2251555123 - 2²¹ = 2249457971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2251555127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 447540 + ... + 452542.

It is an arithmetic number, because the mean of its divisors is an integer number (155644416).

Almost surely, 2^2251555123 is an apocalyptic number.

2251555123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2251555123 is a deficient number, since it is larger than the sum of its proper divisors (238755533).

2251555123 is a wasteful number, since it uses less digits than its factorization.

2251555123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6194.

The product of its digits is 15000, while the sum is 31.

The square root of 2251555123 is about 47450.5545067705. The cubic root of 2251555123 is about 1310.6725220388.

The spelling of 2251555123 in words is "two billion, two hundred fifty-one million, five hundred fifty-five thousand, one hundred twenty-three".