424212251 has 2 divisors, whose sum is σ = 424212252. Its totient is φ = 424212250.

The previous prime is 424212247. The next prime is 424212287. The reversal of 424212251 is 152212424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 424212251 - 2² = 424212247 is a prime.

It is not a weakly prime, because it can be changed into another prime (424412251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212106125 + 212106126.

It is an arithmetic number, because the mean of its divisors is an integer number (212106126).

Almost surely, 2^424212251 is an apocalyptic number.

424212251 is a deficient number, since it is larger than the sum of its proper divisors (1).

424212251 is an equidigital number, since it uses as much as digits as its factorization.

424212251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1280, while the sum is 23.

The square root of 424212251 is about 20596.4135470232. The cubic root of 424212251 is about 751.3824877008.

Adding to 424212251 its reverse (152212424), we get a palindrome (576424675).

The spelling of 424212251 in words is "four hundred twenty-four million, two hundred twelve thousand, two hundred fifty-one".