42633521501 has 2 divisors, whose sum is σ = 42633521502. Its totient is φ = 42633521500.

The previous prime is 42633521461. The next prime is 42633521527. The reversal of 42633521501 is 10512533624.

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., 41497764100 + 1135757401 = 203710^2 + 33701^2 .

It is a cyclic number.

It is not a de Polignac number, because 42633521501 - 2¹⁰ = 42633520477 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42633521591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21316760750 + 21316760751.

It is an arithmetic number, because the mean of its divisors is an integer number (21316760751).

Almost surely, 2^42633521501 is an apocalyptic number.

It is an amenable number.

42633521501 is a deficient number, since it is larger than the sum of its proper divisors (1).

42633521501 is an equidigital number, since it uses as much as digits as its factorization.

42633521501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 32.

The spelling of 42633521501 in words is "forty-two billion, six hundred thirty-three million, five hundred twenty-one thousand, five hundred one".