2549995291 has 4 divisors (see below), whose sum is σ = 2699995032. Its totient is φ = 2399995552.

The previous prime is 2549995247. The next prime is 2549995321. The reversal of 2549995291 is 1925999452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2549995291 - 2¹⁵ = 2549962523 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2549935291) 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, 74999845 + ... + 74999878.

It is an arithmetic number, because the mean of its divisors is an integer number (674998758).

Almost surely, 2^2549995291 is an apocalyptic number.

2549995291 is a deficient number, since it is larger than the sum of its proper divisors (149999741).

2549995291 is a wasteful number, since it uses less digits than its factorization.

2549995291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149999740.

The product of its digits is 2624400, while the sum is 55.

The square root of 2549995291 is about 50497.4780657411. The cubic root of 2549995291 is about 1366.1963670764.

The spelling of 2549995291 in words is "two billion, five hundred forty-nine million, nine hundred ninety-five thousand, two hundred ninety-one".