420406631312215 has 16 divisors (see below), whose sum is σ = 534206273815008. Its totient is φ = 316516246373376.

The previous prime is 420406631312209. The next prime is 420406631312251. The reversal of 420406631312215 is 512213136604024.

It is a cyclic number.

It is not a de Polignac number, because 420406631312215 - 2²³ = 420406622923607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 195936117 + ... + 198070126.

It is an arithmetic number, because the mean of its divisors is an integer number (33387892113438).

Almost surely, 2^{420406631312215} is an apocalyptic number.

420406631312215 is a deficient number, since it is larger than the sum of its proper divisors (113799642502793).

420406631312215 is a wasteful number, since it uses less digits than its factorization.

420406631312215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 394018818.

The product of its (nonzero) digits is 207360, while the sum is 40.

Adding to 420406631312215 its reverse (512213136604024), we get a palindrome (932619767916239).

The spelling of 420406631312215 in words is "four hundred twenty trillion, four hundred six billion, six hundred thirty-one million, three hundred twelve thousand, two hundred fifteen".