42635533531 has 12 divisors (see below), whose sum is σ = 45006612552. Its totient is φ = 40383480384.

The previous prime is 42635533487. The next prime is 42635533561. The reversal of 42635533531 is 13533553624.

It is not a de Polignac number, because 42635533531 - 2¹⁹ = 42635009243 is a prime.

It is a super-2 number, since 2×42635533531² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42635533561) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2586291 + ... + 2602723.

It is an arithmetic number, because the mean of its divisors is an integer number (3750551046).

Almost surely, 2^42635533531 is an apocalyptic number.

42635533531 is a deficient number, since it is larger than the sum of its proper divisors (2371079021).

42635533531 is a wasteful number, since it uses less digits than its factorization.

42635533531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23658 (or 23639 counting only the distinct ones).

The product of its digits is 486000, while the sum is 40.

The spelling of 42635533531 in words is "forty-two billion, six hundred thirty-five million, five hundred thirty-three thousand, five hundred thirty-one".