420401431231 has 4 divisors (see below), whose sum is σ = 438679754352. Its totient is φ = 402123108112.

The previous prime is 420401431217. The next prime is 420401431259. The reversal of 420401431231 is 132134104024.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 420401431231 - 2⁵ = 420401431199 is a prime.

It is a super-2 number, since 2×420401431231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420401431196 and 420401431205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420401431211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9139161526 + ... + 9139161571.

It is an arithmetic number, because the mean of its divisors is an integer number (109669938588).

Almost surely, 2^420401431231 is an apocalyptic number.

420401431231 is a deficient number, since it is larger than the sum of its proper divisors (18278323121).

420401431231 is a wasteful number, since it uses less digits than its factorization.

420401431231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18278323120.

The product of its (nonzero) digits is 2304, while the sum is 25.

Adding to 420401431231 its reverse (132134104024), we get a palindrome (552535535255).

The spelling of 420401431231 in words is "four hundred twenty billion, four hundred one million, four hundred thirty-one thousand, two hundred thirty-one".