2154972151 has 4 divisors (see below), whose sum is σ = 2155129704. Its totient is φ = 2154814600.

The previous prime is 2154972119. The next prime is 2154972163. The reversal of 2154972151 is 1512794512.

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 2154972151 - 2⁵ = 2154972119 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2154972151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154972101) 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, 56080 + ... + 86341.

It is an arithmetic number, because the mean of its divisors is an integer number (538782426).

Almost surely, 2^2154972151 is an apocalyptic number.

2154972151 is a deficient number, since it is larger than the sum of its proper divisors (157553).

2154972151 is a wasteful number, since it uses less digits than its factorization.

2154972151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157552.

The product of its digits is 25200, while the sum is 37.

The square root of 2154972151 is about 46421.6775978637. The cubic root of 2154972151 is about 1291.6570558804.

The spelling of 2154972151 in words is "two billion, one hundred fifty-four million, nine hundred seventy-two thousand, one hundred fifty-one".