42031430381 has 2 divisors, whose sum is σ = 42031430382. Its totient is φ = 42031430380.

The previous prime is 42031430351. The next prime is 42031430443. The reversal of 42031430381 is 18303413024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38783000356 + 3248430025 = 196934^2 + 56995^2 .

It is a cyclic number.

It is not a de Polignac number, because 42031430381 - 2²² = 42027236077 is a prime.

It is a super-3 number, since 3×42031430381³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42031430351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21015715190 + 21015715191.

It is an arithmetic number, because the mean of its divisors is an integer number (21015715191).

Almost surely, 2^42031430381 is an apocalyptic number.

It is an amenable number.

42031430381 is a deficient number, since it is larger than the sum of its proper divisors (1).

42031430381 is an equidigital number, since it uses as much as digits as its factorization.

42031430381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The spelling of 42031430381 in words is "forty-two billion, thirty-one million, four hundred thirty thousand, three hundred eighty-one".