2151328901 has 4 divisors (see below), whose sum is σ = 2165767500. Its totient is φ = 2136890304.

The previous prime is 2151328889. The next prime is 2151328909. The reversal of 2151328901 is 1098231512.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 669463876 + 1481865025 = 25874^2 + 38495^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2151328901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151328909) 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, 7219076 + ... + 7219373.

It is an arithmetic number, because the mean of its divisors is an integer number (541441875).

Almost surely, 2^2151328901 is an apocalyptic number.

It is an amenable number.

2151328901 is a deficient number, since it is larger than the sum of its proper divisors (14438599).

2151328901 is a wasteful number, since it uses less digits than its factorization.

2151328901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14438598.

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 2151328901 is about 46382.4201718712. The cubic root of 2151328901 is about 1290.9287426798.

The spelling of 2151328901 in words is "two billion, one hundred fifty-one million, three hundred twenty-eight thousand, nine hundred one".