612422251 has 4 divisors (see below), whose sum is σ = 699911152. Its totient is φ = 524933352.

The previous prime is 612422221. The next prime is 612422273. The reversal of 612422251 is 152224216.

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 612422251 - 2¹¹ = 612420203 is a prime.

It is a super-2 number, since 2×612422251² = 750122027039814002, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (612422221) 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, 43744440 + ... + 43744453.

It is an arithmetic number, because the mean of its divisors is an integer number (174977788).

Almost surely, 2^612422251 is an apocalyptic number.

612422251 is a deficient number, since it is larger than the sum of its proper divisors (87488901).

612422251 is an equidigital number, since it uses as much as digits as its factorization.

612422251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87488900.

The product of its digits is 1920, while the sum is 25.

The square root of 612422251 is about 24747.1665246751. The cubic root of 612422251 is about 849.2136908267.

Adding to 612422251 its reverse (152224216), we get a palindrome (764646467).

The spelling of 612422251 in words is "six hundred twelve million, four hundred twenty-two thousand, two hundred fifty-one".