2156211610 has 32 divisors (see below), whose sum is σ = 4442584320. Its totient is φ = 738114432.

The previous prime is 2156211571. The next prime is 2156211619. The reversal of 2156211610 is 161126512.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2156211619) 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, 21486 + ... + 69094.

It is an arithmetic number, because the mean of its divisors is an integer number (138830760).

Almost surely, 2^2156211610 is an apocalyptic number.

2156211610 is an abundant number, since it is smaller than the sum of its proper divisors (2286372710).

2156211610 is a wasteful number, since it uses less digits than its factorization.

2156211610 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48270.

The product of its (nonzero) digits is 720, while the sum is 25.

The square root of 2156211610 is about 46435.0256810524. The cubic root of 2156211610 is about 1291.9046459515.

The spelling of 2156211610 in words is "two billion, one hundred fifty-six million, two hundred eleven thousand, six hundred ten".