42125655320431 has 2 divisors, whose sum is σ = 42125655320432. Its totient is φ = 42125655320430.

The previous prime is 42125655320201. The next prime is 42125655320587. The reversal of 42125655320431 is 13402355652124.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42125655320431 is a prime.

It is a super-2 number, since 2×42125655320431² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42125655300431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21062827660215 + 21062827660216.

It is an arithmetic number, because the mean of its divisors is an integer number (21062827660216).

Almost surely, 2^{42125655320431} is an apocalyptic number.

42125655320431 is a deficient number, since it is larger than the sum of its proper divisors (1).

42125655320431 is an equidigital number, since it uses as much as digits as its factorization.

42125655320431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864000, while the sum is 43.

The spelling of 42125655320431 in words is "forty-two trillion, one hundred twenty-five billion, six hundred fifty-five million, three hundred twenty thousand, four hundred thirty-one".