2274021491 has 4 divisors (see below), whose sum is σ = 2598881712. Its totient is φ = 1949161272.

The previous prime is 2274021469. The next prime is 2274021493. The reversal of 2274021491 is 1941204722.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1941204722 = 2 ⋅970602361.

It is a cyclic number.

It is not a de Polignac number, because 2274021491 - 2⁶ = 2274021427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2274021493) 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, 162430100 + ... + 162430113.

It is an arithmetic number, because the mean of its divisors is an integer number (649720428).

Almost surely, 2^2274021491 is an apocalyptic number.

2274021491 is a deficient number, since it is larger than the sum of its proper divisors (324860221).

2274021491 is an equidigital number, since it uses as much as digits as its factorization.

2274021491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324860220.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 2274021491 is about 47686.7014061573. The cubic root of 2274021491 is about 1315.0174673233.

The spelling of 2274021491 in words is "two billion, two hundred seventy-four million, twenty-one thousand, four hundred ninety-one".