415431661 has 2 divisors, whose sum is σ = 415431662. Its totient is φ = 415431660.

The previous prime is 415431659. The next prime is 415431707. The reversal of 415431661 is 166134514.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 246301636 + 169130025 = 15694^2 + 13005^2 .

It is a cyclic number.

It is not a de Polignac number, because 415431661 - 2¹ = 415431659 is a prime.

It is a super-2 number, since 2×415431661² = 345166929922437842, which contains 22 as substring.

Together with 415431659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (415431631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 207715830 + 207715831.

It is an arithmetic number, because the mean of its divisors is an integer number (207715831).

Almost surely, 2^415431661 is an apocalyptic number.

It is an amenable number.

415431661 is a deficient number, since it is larger than the sum of its proper divisors (1).

415431661 is an equidigital number, since it uses as much as digits as its factorization.

415431661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8640, while the sum is 31.

The square root of 415431661 is about 20382.1407364388. The cubic root of 415431661 is about 746.1621194329.

The spelling of 415431661 in words is "four hundred fifteen million, four hundred thirty-one thousand, six hundred sixty-one".