421083587525 has 6 divisors (see below), whose sum is σ = 522143648562. Its totient is φ = 336866870000.

The previous prime is 421083587513. The next prime is 421083587557. The reversal of 421083587525 is 525785380124.

It can be written as a sum of positive squares in 3 ways, for example, as 6181418884 + 414902168641 = 78622^2 + 644129^2 .

It is not a de Polignac number, because 421083587525 - 2¹² = 421083583429 is a prime.

It is a super-2 number, since 2×421083587525² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8421671726 + ... + 8421671775.

It is an arithmetic number, because the mean of its divisors is an integer number (87023941427).

Almost surely, 2^421083587525 is an apocalyptic number.

It is an amenable number.

421083587525 is a deficient number, since it is larger than the sum of its proper divisors (101060061037).

421083587525 is a wasteful number, since it uses less digits than its factorization.

421083587525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16843343511 (or 16843343506 counting only the distinct ones).

The product of its (nonzero) digits is 2688000, while the sum is 50.

The spelling of 421083587525 in words is "four hundred twenty-one billion, eighty-three million, five hundred eighty-seven thousand, five hundred twenty-five".