2151966593 has 4 divisors (see below), whose sum is σ = 2459390400. Its totient is φ = 1844542788.

The previous prime is 2151966563. The next prime is 2151966599. The reversal of 2151966593 is 3956691512.

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 2151966593 - 2⁸ = 2151966337 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2151966599) 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, 153711893 + ... + 153711906.

It is an arithmetic number, because the mean of its divisors is an integer number (614847600).

Almost surely, 2^2151966593 is an apocalyptic number.

It is an amenable number.

2151966593 is a deficient number, since it is larger than the sum of its proper divisors (307423807).

2151966593 is an equidigital number, since it uses as much as digits as its factorization.

2151966593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 307423806.

The product of its digits is 437400, while the sum is 47.

The square root of 2151966593 is about 46389.2939480652. The cubic root of 2151966593 is about 1291.0562814623.

The spelling of 2151966593 in words is "two billion, one hundred fifty-one million, nine hundred sixty-six thousand, five hundred ninety-three".