2154857555 has 16 divisors (see below), whose sum is σ = 2606320800. Its totient is φ = 1710263808.

The previous prime is 2154857527. The next prime is 2154857561. The reversal of 2154857555 is 5557584512.

It is not a de Polignac number, because 2154857555 - 2¹⁸ = 2154595411 is a prime.

It is a super-2 number, since 2×2154857555² = 9286822164681156050, which contains 22 as substring.

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, 530171 + ... + 534219.

It is an arithmetic number, because the mean of its divisors is an integer number (162895050).

Almost surely, 2^2154857555 is an apocalyptic number.

2154857555 is a deficient number, since it is larger than the sum of its proper divisors (451463245).

2154857555 is a wasteful number, since it uses less digits than its factorization.

2154857555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4870.

The product of its digits is 1400000, while the sum is 47.

The square root of 2154857555 is about 46420.4432874138. The cubic root of 2154857555 is about 1291.6341597831.

The spelling of 2154857555 in words is "two billion, one hundred fifty-four million, eight hundred fifty-seven thousand, five hundred fifty-five".