2151972763 has 4 divisors (see below), whose sum is σ = 2168400168. Its totient is φ = 2135545360.

The previous prime is 2151972751. The next prime is 2151972793. The reversal of 2151972763 is 3672791512.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2151972763 - 2⁵ = 2151972731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2151972703) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8213506 + ... + 8213767.

It is an arithmetic number, because the mean of its divisors is an integer number (542100042).

Almost surely, 2^2151972763 is an apocalyptic number.

2151972763 is a deficient number, since it is larger than the sum of its proper divisors (16427405).

2151972763 is a wasteful number, since it uses less digits than its factorization.

2151972763 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16427404.

The product of its digits is 158760, while the sum is 43.

The square root of 2151972763 is about 46389.3604504309. The cubic root of 2151972763 is about 1291.0575153429.

The spelling of 2151972763 in words is "two billion, one hundred fifty-one million, nine hundred seventy-two thousand, seven hundred sixty-three".