42143523021 has 24 divisors (see below), whose sum is σ = 65893858560. Its totient is φ = 26616955752.

The previous prime is 42143522989. The next prime is 42143523049. The reversal of 42143523021 is 12032534124.

42143523021 is a `hidden beast` number, since 4 + 2 + 1 + 4 + 352 + 302 + 1 = 666.

It is not a de Polignac number, because 42143523021 - 2⁵ = 42143522989 is a prime.

It is a super-3 number, since 3×42143523021³ (a number of 33 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42143523091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2152125 + ... + 2171618.

It is an arithmetic number, because the mean of its divisors is an integer number (2745577440).

Almost surely, 2^42143523021 is an apocalyptic number.

It is an amenable number.

42143523021 is a deficient number, since it is larger than the sum of its proper divisors (23750335539).

42143523021 is a wasteful number, since it uses less digits than its factorization.

42143523021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4323790 (or 4323765 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The spelling of 42143523021 in words is "forty-two billion, one hundred forty-three million, five hundred twenty-three thousand, twenty-one".