420214631 has 2 divisors, whose sum is σ = 420214632. Its totient is φ = 420214630.

The previous prime is 420214609. The next prime is 420214643. The reversal of 420214631 is 136412024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420214631 is a prime.

It is a super-2 number, since 2×420214631² = 353160672212932322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 420214597 and 420214606.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420214651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210107315 + 210107316.

It is an arithmetic number, because the mean of its divisors is an integer number (210107316).

Almost surely, 2^420214631 is an apocalyptic number.

420214631 is a deficient number, since it is larger than the sum of its proper divisors (1).

420214631 is an equidigital number, since it uses as much as digits as its factorization.

420214631 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 420214631 is about 20499.1373233119. The cubic root of 420214631 is about 749.0147839956.

Adding to 420214631 its reverse (136412024), we get a palindrome (556626655).

The spelling of 420214631 in words is "four hundred twenty million, two hundred fourteen thousand, six hundred thirty-one".