424235681 has 2 divisors, whose sum is σ = 424235682. Its totient is φ = 424235680.

The previous prime is 424235657. The next prime is 424235687. The reversal of 424235681 is 186532424.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 400800400 + 23435281 = 20020^2 + 4841^2 .

It is a cyclic number.

It is not a de Polignac number, because 424235681 - 2¹⁴ = 424219297 is a prime.

It is a super-2 number, since 2×424235681² = 359951826067067522, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (424235687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212117840 + 212117841.

It is an arithmetic number, because the mean of its divisors is an integer number (212117841).

Almost surely, 2^424235681 is an apocalyptic number.

It is an amenable number.

424235681 is a deficient number, since it is larger than the sum of its proper divisors (1).

424235681 is an equidigital number, since it uses as much as digits as its factorization.

424235681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 46080, while the sum is 35.

The square root of 424235681 is about 20596.9823275158. The cubic root of 424235681 is about 751.3963208449.

The spelling of 424235681 in words is "four hundred twenty-four million, two hundred thirty-five thousand, six hundred eighty-one".