420507608531 has 2 divisors, whose sum is σ = 420507608532. Its totient is φ = 420507608530.

The previous prime is 420507608519. The next prime is 420507608551. The reversal of 420507608531 is 135806705024.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420507608531 is a prime.

It is a super-2 number, since 2×420507608531² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420507608551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210253804265 + 210253804266.

It is an arithmetic number, because the mean of its divisors is an integer number (210253804266).

Almost surely, 2^420507608531 is an apocalyptic number.

420507608531 is a deficient number, since it is larger than the sum of its proper divisors (1).

420507608531 is an equidigital number, since it uses as much as digits as its factorization.

420507608531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 420507608531 in words is "four hundred twenty billion, five hundred seven million, six hundred eight thousand, five hundred thirty-one".