2157470555 has 8 divisors (see below), whose sum is σ = 2658936912. Its totient is φ = 1679328288.

The previous prime is 2157470533. The next prime is 2157470591. The reversal of 2157470555 is 5550747512.

It is a happy number.

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 2157470555 - 2⁸ = 2157470299 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5830817 + ... + 5831186.

It is an arithmetic number, because the mean of its divisors is an integer number (332367114).

Almost surely, 2^2157470555 is an apocalyptic number.

2157470555 is a deficient number, since it is larger than the sum of its proper divisors (501466357).

2157470555 is a wasteful number, since it uses less digits than its factorization.

2157470555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11662045.

The product of its (nonzero) digits is 245000, while the sum is 41.

The square root of 2157470555 is about 46448.5796876503. The cubic root of 2157470555 is about 1292.1560313671.

It can be divided in two parts, 21574 and 70555, that added together give a palindrome (92129).

The spelling of 2157470555 in words is "two billion, one hundred fifty-seven million, four hundred seventy thousand, five hundred fifty-five".