2154245555 has 48 divisors (see below), whose sum is σ = 3453269760. Its totient is φ = 1272196800.

The previous prime is 2154245543. The next prime is 2154245557. The reversal of 2154245555 is 5555424512.

It is not a de Polignac number, because 2154245555 - 2¹⁶ = 2154180019 is a prime.

It is a super-2 number, since 2×2154245555² = 9281547822474516050, which contains 22 as substring.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (2154245557) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 30170 + ... + 72240.

It is an arithmetic number, because the mean of its divisors is an integer number (71943120).

Almost surely, 2^2154245555 is an apocalyptic number.

2154245555 is a deficient number, since it is larger than the sum of its proper divisors (1299024205).

2154245555 is a wasteful number, since it uses less digits than its factorization.

2154245555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42120 (or 42113 counting only the distinct ones).

The product of its digits is 200000, while the sum is 38.

The square root of 2154245555 is about 46413.8508960418. The cubic root of 2154245555 is about 1291.5118694179.

The spelling of 2154245555 in words is "two billion, one hundred fifty-four million, two hundred forty-five thousand, five hundred fifty-five".