42521302823 has 2 divisors, whose sum is σ = 42521302824. Its totient is φ = 42521302822.

The previous prime is 42521302741. The next prime is 42521302897. The reversal of 42521302823 is 32820312524.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42521302823 is a prime.

It is a super-2 number, since 2×42521302823² (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 42521302823.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42521302123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260651411 + 21260651412.

It is an arithmetic number, because the mean of its divisors is an integer number (21260651412).

Almost surely, 2^42521302823 is an apocalyptic number.

42521302823 is a deficient number, since it is larger than the sum of its proper divisors (1).

42521302823 is an equidigital number, since it uses as much as digits as its factorization.

42521302823 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 42521302823 in words is "forty-two billion, five hundred twenty-one million, three hundred two thousand, eight hundred twenty-three".