2156245306 has 16 divisors (see below), whose sum is σ = 3254991840. Its totient is φ = 1071267120.

The previous prime is 2156245279. The next prime is 2156245313. The reversal of 2156245306 is 6035426512.

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, 241225 + ... + 250003.

It is an arithmetic number, because the mean of its divisors is an integer number (203436990).

Almost surely, 2^2156245306 is an apocalyptic number.

2156245306 is a deficient number, since it is larger than the sum of its proper divisors (1098746534).

2156245306 is a wasteful number, since it uses less digits than its factorization.

2156245306 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9549.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 2156245306 is about 46435.3885091963. The cubic root of 2156245306 is about 1291.9113756237.

The spelling of 2156245306 in words is "two billion, one hundred fifty-six million, two hundred forty-five thousand, three hundred six".