42520210621 has 16 divisors (see below), whose sum is σ = 48680654464. Its totient is φ = 36381369024.

The previous prime is 42520210591. The next prime is 42520210627. The reversal of 42520210621 is 12601202524.

It is not a de Polignac number, because 42520210621 - 2⁵ = 42520210589 is a prime.

It is a super-2 number, since 2×42520210621² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42520210627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15706150 + ... + 15708856.

It is an arithmetic number, because the mean of its divisors is an integer number (3042540904).

Almost surely, 2^42520210621 is an apocalyptic number.

It is an amenable number.

42520210621 is a deficient number, since it is larger than the sum of its proper divisors (6160443843).

42520210621 is a wasteful number, since it uses less digits than its factorization.

42520210621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5860.

The product of its (nonzero) digits is 1920, while the sum is 25.

The spelling of 42520210621 in words is "forty-two billion, five hundred twenty million, two hundred ten thousand, six hundred twenty-one".