1822254397 has 4 divisors (see below), whose sum is σ = 1847216860. Its totient is φ = 1797291936.

The previous prime is 1822254391. The next prime is 1822254433. The reversal of 1822254397 is 7934522281.

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

It can be written as a sum of positive squares in 2 ways, for example, as 351225081 + 1471029316 = 18741^2 + 38354^2 .

It is a cyclic number.

It is not a de Polignac number, because 1822254397 - 2¹⁹ = 1821730109 is a prime.

It is a super-2 number, since 2×1822254397² = 6641222174771667218, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1822254391) 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, 12481122 + ... + 12481267.

It is an arithmetic number, because the mean of its divisors is an integer number (461804215).

Almost surely, 2^1822254397 is an apocalyptic number.

It is an amenable number.

1822254397 is a deficient number, since it is larger than the sum of its proper divisors (24962463).

1822254397 is an equidigital number, since it uses as much as digits as its factorization.

1822254397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24962462.

The product of its digits is 241920, while the sum is 43.

The square root of 1822254397 is about 42687.8717787617. The cubic root of 1822254397 is about 1221.4330551172.

The spelling of 1822254397 in words is "one billion, eight hundred twenty-two million, two hundred fifty-four thousand, three hundred ninety-seven".