2156253005 has 8 divisors (see below), whose sum is σ = 2610402552. Its totient is φ = 1709736448.

The previous prime is 2156252977. The next prime is 2156253023. The reversal of 2156253005 is 5003526512.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 118091689 + 2038161316 = 10867^2 + 45146^2 .

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 2156253005 - 2⁶ = 2156252941 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1907624 + ... + 1908753.

It is an arithmetic number, because the mean of its divisors is an integer number (326300319).

Almost surely, 2^2156253005 is an apocalyptic number.

It is an amenable number.

2156253005 is a deficient number, since it is larger than the sum of its proper divisors (454149547).

2156253005 is a wasteful number, since it uses less digits than its factorization.

2156253005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3816495.

The product of its (nonzero) digits is 9000, while the sum is 29.

The square root of 2156253005 is about 46435.4714092578. The cubic root of 2156253005 is about 1291.9129132369.

Adding to 2156253005 its reverse (5003526512), we get a palindrome (7159779517).

The spelling of 2156253005 in words is "two billion, one hundred fifty-six million, two hundred fifty-three thousand, five".