2154857557 has 8 divisors (see below), whose sum is σ = 2326083840. Its totient is φ = 1990092720.

The previous prime is 2154857527. The next prime is 2154857561. The reversal of 2154857557 is 7557584512.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2154857557 - 2¹¹ = 2154855509 is a prime.

It is a super-2 number, since 2×2154857557² = 9286822181920016498, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2154857557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154857527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1614669 + ... + 1616002.

It is an arithmetic number, because the mean of its divisors is an integer number (290760480).

Almost surely, 2^2154857557 is an apocalyptic number.

It is an amenable number.

2154857557 is a deficient number, since it is larger than the sum of its proper divisors (171226283).

2154857557 is a wasteful number, since it uses less digits than its factorization.

2154857557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3230723.

The product of its digits is 1960000, while the sum is 49.

The square root of 2154857557 is about 46420.4433089560. The cubic root of 2154857557 is about 1291.6341601827.

The spelling of 2154857557 in words is "two billion, one hundred fifty-four million, eight hundred fifty-seven thousand, five hundred fifty-seven".