2151249195 has 16 divisors (see below), whose sum is σ = 3483470592. Its totient is φ = 1133508960.

The previous prime is 2151249187. The next prime is 2151249223. The reversal of 2151249195 is 5919421512.

It is a happy number.

It is not a de Polignac number, because 2151249195 - 2³ = 2151249187 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 862711 + ... + 865200.

It is an arithmetic number, because the mean of its divisors is an integer number (217716912).

Almost surely, 2^2151249195 is an apocalyptic number.

2151249195 is a deficient number, since it is larger than the sum of its proper divisors (1332221397).

2151249195 is a wasteful number, since it uses less digits than its factorization.

2151249195 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1728002.

The product of its digits is 32400, while the sum is 39.

The square root of 2151249195 is about 46381.5609375105. The cubic root of 2151249195 is about 1290.9127996601.

It can be divided in two parts, 21512 and 49195, that added together give a palindrome (70707).

The spelling of 2151249195 in words is "two billion, one hundred fifty-one million, two hundred forty-nine thousand, one hundred ninety-five".