2151440555 has 16 divisors (see below), whose sum is σ = 2818144224. Its totient is φ = 1563732480.

The previous prime is 2151440549. The next prime is 2151440567. The reversal of 2151440555 is 5550441512.

It is not a de Polignac number, because 2151440555 - 2¹⁶ = 2151375019 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86729 + ... + 108741.

It is an arithmetic number, because the mean of its divisors is an integer number (176134014).

Almost surely, 2^2151440555 is an apocalyptic number.

2151440555 is a deficient number, since it is larger than the sum of its proper divisors (666703669).

2151440555 is a wasteful number, since it uses less digits than its factorization.

2151440555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23806.

The product of its (nonzero) digits is 20000, while the sum is 32.

The square root of 2151440555 is about 46383.6237803818. The cubic root of 2151440555 is about 1290.9510753667.

The spelling of 2151440555 in words is "two billion, one hundred fifty-one million, four hundred forty thousand, five hundred fifty-five".