420123415215431 has 16 divisors (see below), whose sum is σ = 449734587542400. Its totient is φ = 391262301319968.

The previous prime is 420123415215373. The next prime is 420123415215443. The reversal of 420123415215431 is 134512514321024.

It is not a de Polignac number, because 420123415215431 - 2¹⁰ = 420123415214407 is a prime.

It is a super-2 number, since 2×420123415215431² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420123415215131) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132564920 + ... + 135697106.

It is an arithmetic number, because the mean of its divisors is an integer number (28108411721400).

Almost surely, 2^{420123415215431} is an apocalyptic number.

420123415215431 is a deficient number, since it is larger than the sum of its proper divisors (29611172326969).

420123415215431 is a wasteful number, since it uses less digits than its factorization.

420123415215431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3251918.

The product of its (nonzero) digits is 115200, while the sum is 38.

Adding to 420123415215431 its reverse (134512514321024), we get a palindrome (554635929536455).

The spelling of 420123415215431 in words is "four hundred twenty trillion, one hundred twenty-three billion, four hundred fifteen million, two hundred fifteen thousand, four hundred thirty-one".