42015535551 has 18 divisors (see below), whose sum is σ = 66707863040. Its totient is φ = 25463960280.

The previous prime is 42015535543. The next prime is 42015535553. The reversal of 42015535551 is 15553551024.

42015535551 is a `hidden beast` number, since 4 + 2 + 0 + 1 + 553 + 55 + 51 = 666.

42015535551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42015535551 - 2³ = 42015535543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42015535553) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 19289791 + ... + 19291968.

Almost surely, 2^42015535551 is an apocalyptic number.

42015535551 is a deficient number, since it is larger than the sum of its proper divisors (24692327489).

42015535551 is a wasteful number, since it uses less digits than its factorization.

42015535551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38581787 (or 38581773 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 36.

The spelling of 42015535551 in words is "forty-two billion, fifteen million, five hundred thirty-five thousand, five hundred fifty-one".