2156515445 has 16 divisors (see below), whose sum is σ = 2969301888. Its totient is φ = 1472856000.

The previous prime is 2156515441. The next prime is 2156515457. The reversal of 2156515445 is 5445156512.

It is not a de Polignac number, because 2156515445 - 2² = 2156515441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2156515399 and 2156515408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2156515441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113954 + ... + 131523.

It is an arithmetic number, because the mean of its divisors is an integer number (185581368).

Almost surely, 2^2156515445 is an apocalyptic number.

It is an amenable number.

2156515445 is a deficient number, since it is larger than the sum of its proper divisors (812786443).

2156515445 is a wasteful number, since it uses less digits than its factorization.

2156515445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245740.

The product of its digits is 120000, while the sum is 38.

The square root of 2156515445 is about 46438.2971802369. The cubic root of 2156515445 is about 1291.9653245062.

The spelling of 2156515445 in words is "two billion, one hundred fifty-six million, five hundred fifteen thousand, four hundred forty-five".