42531604501 has 2 divisors, whose sum is σ = 42531604502. Its totient is φ = 42531604500.

The previous prime is 42531604441. The next prime is 42531604523. The reversal of 42531604501 is 10540613524.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27512856900 + 15018747601 = 165870^2 + 122551^2 .

It is a cyclic number.

It is not a de Polignac number, because 42531604501 - 2¹⁹ = 42531080213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42531604541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21265802250 + 21265802251.

It is an arithmetic number, because the mean of its divisors is an integer number (21265802251).

Almost surely, 2^42531604501 is an apocalyptic number.

It is an amenable number.

42531604501 is a deficient number, since it is larger than the sum of its proper divisors (1).

42531604501 is an equidigital number, since it uses as much as digits as its factorization.

42531604501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 42531604501 in words is "forty-two billion, five hundred thirty-one million, six hundred four thousand, five hundred one".