42021351431 has 2 divisors, whose sum is σ = 42021351432. Its totient is φ = 42021351430.

The previous prime is 42021351419. The next prime is 42021351443. The reversal of 42021351431 is 13415312024.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (42021351419) and next prime (42021351443).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42021351431 is a prime.

It is a super-2 number, since 2×42021351431² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 42021351431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42021351481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21010675715 + 21010675716.

It is an arithmetic number, because the mean of its divisors is an integer number (21010675716).

Almost surely, 2^42021351431 is an apocalyptic number.

42021351431 is a deficient number, since it is larger than the sum of its proper divisors (1).

42021351431 is an equidigital number, since it uses as much as digits as its factorization.

42021351431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

Adding to 42021351431 its reverse (13415312024), we get a palindrome (55436663455).

The spelling of 42021351431 in words is "forty-two billion, twenty-one million, three hundred fifty-one thousand, four hundred thirty-one".