2151238999 has 16 divisors (see below), whose sum is σ = 2657551680. Its totient is φ = 1695732480.

The previous prime is 2151238997. The next prime is 2151239003. The reversal of 2151238999 is 9998321512.

It is not a de Polignac number, because 2151238999 - 2¹ = 2151238997 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151238997) 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, 19462 + ... + 68419.

It is an arithmetic number, because the mean of its divisors is an integer number (166096980).

Almost surely, 2^2151238999 is an apocalyptic number.

2151238999 is a deficient number, since it is larger than the sum of its proper divisors (506312681).

2151238999 is a wasteful number, since it uses less digits than its factorization.

2151238999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88170.

The product of its digits is 349920, while the sum is 49.

The square root of 2151238999 is about 46381.4510230113. The cubic root of 2151238999 is about 1290.9107601989.

The spelling of 2151238999 in words is "two billion, one hundred fifty-one million, two hundred thirty-eight thousand, nine hundred ninety-nine".