2151249194 has 8 divisors (see below), whose sum is σ = 3227341860. Its totient is φ = 1075468576.

The previous prime is 2151249187. The next prime is 2151249223. The reversal of 2151249194 is 4919421512.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2059798225 + 91450969 = 45385^2 + 9563^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59939 + ... + 88854.

Almost surely, 2^2151249194 is an apocalyptic number.

2151249194 is a deficient number, since it is larger than the sum of its proper divisors (1076092666).

2151249194 is a wasteful number, since it uses less digits than its factorization.

2151249194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156024.

The product of its digits is 25920, while the sum is 38.

The square root of 2151249194 is about 46381.5609267304. The cubic root of 2151249194 is about 1290.9127994600.

The spelling of 2151249194 in words is "two billion, one hundred fifty-one million, two hundred forty-nine thousand, one hundred ninety-four".