2391152381 has 4 divisors (see below), whose sum is σ = 2495115552. Its totient is φ = 2287189212.

The previous prime is 2391152371. The next prime is 2391152389. The reversal of 2391152381 is 1832511932.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2391152381 - 2¹⁸ = 2390890237 is a prime.

It is a super-2 number, since 2×2391152381² = 11435219418323938322, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2391152389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 51981551 + ... + 51981596.

It is an arithmetic number, because the mean of its divisors is an integer number (623778888).

Almost surely, 2^2391152381 is an apocalyptic number.

It is an amenable number.

2391152381 is a deficient number, since it is larger than the sum of its proper divisors (103963171).

2391152381 is a wasteful number, since it uses less digits than its factorization.

2391152381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103963170.

The product of its digits is 12960, while the sum is 35.

The square root of 2391152381 is about 48899.4108451216. The cubic root of 2391152381 is about 1337.2186276952.

The spelling of 2391152381 in words is "two billion, three hundred ninety-one million, one hundred fifty-two thousand, three hundred eighty-one".