2151172862 has 4 divisors (see below), whose sum is σ = 3226759296. Its totient is φ = 1075586430.

The previous prime is 2151172861. The next prime is 2151172867. The reversal of 2151172862 is 2682711512.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151172861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 537793214 + ... + 537793217.

It is an arithmetic number, because the mean of its divisors is an integer number (806689824).

Almost surely, 2^2151172862 is an apocalyptic number.

2151172862 is a deficient number, since it is larger than the sum of its proper divisors (1075586434).

2151172862 is a wasteful number, since it uses less digits than its factorization.

2151172862 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1075586433.

The product of its digits is 13440, while the sum is 35.

The square root of 2151172862 is about 46380.7380493239. The cubic root of 2151172862 is about 1290.8975309482.

The spelling of 2151172862 in words is "two billion, one hundred fifty-one million, one hundred seventy-two thousand, eight hundred sixty-two".