42090215231 has 2 divisors, whose sum is σ = 42090215232. Its totient is φ = 42090215230.

The previous prime is 42090215149. The next prime is 42090215327. The reversal of 42090215231 is 13251209024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42090215231 - 2¹⁴ = 42090198847 is a prime.

It is a super-2 number, since 2×42090215231² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42090215194 and 42090215203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42090215131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21045107615 + 21045107616.

It is an arithmetic number, because the mean of its divisors is an integer number (21045107616).

Almost surely, 2^42090215231 is an apocalyptic number.

42090215231 is a deficient number, since it is larger than the sum of its proper divisors (1).

42090215231 is an equidigital number, since it uses as much as digits as its factorization.

42090215231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 29.

The spelling of 42090215231 in words is "forty-two billion, ninety million, two hundred fifteen thousand, two hundred thirty-one".