2126564155 has 4 divisors (see below), whose sum is σ = 2551876992. Its totient is φ = 1701251320.

The previous prime is 2126564149. The next prime is 2126564161. The reversal of 2126564155 is 5514656212.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2126564149) and next prime (2126564161).

It is not a de Polignac number, because 2126564155 - 2¹⁵ = 2126531387 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212656411 + ... + 212656420.

It is an arithmetic number, because the mean of its divisors is an integer number (637969248).

Almost surely, 2^2126564155 is an apocalyptic number.

2126564155 is a deficient number, since it is larger than the sum of its proper divisors (425312837).

2126564155 is an equidigital number, since it uses as much as digits as its factorization.

2126564155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425312836.

The product of its digits is 72000, while the sum is 37.

The square root of 2126564155 is about 46114.6848086377. The cubic root of 2126564155 is about 1285.9561597652.

It can be divided in two parts, 212656 and 4155, that added together give a triangular number (216811 = T₆₅₈).

The spelling of 2126564155 in words is "two billion, one hundred twenty-six million, five hundred sixty-four thousand, one hundred fifty-five".