421151013235531 has 4 divisors (see below), whose sum is σ = 425883047092200. Its totient is φ = 416418979378864.

The previous prime is 421151013235529. The next prime is 421151013235571. The reversal of 421151013235531 is 135532310151124.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 421151013235531 - 2¹ = 421151013235529 is a prime.

It is a super-2 number, since 2×421151013235531² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (421151013235571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2366016928201 + ... + 2366016928378.

It is an arithmetic number, because the mean of its divisors is an integer number (106470761773050).

Almost surely, 2^{421151013235531} is an apocalyptic number.

421151013235531 is a deficient number, since it is larger than the sum of its proper divisors (4732033856669).

421151013235531 is an equidigital number, since it uses as much as digits as its factorization.

421151013235531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732033856668.

The product of its (nonzero) digits is 54000, while the sum is 37.

Adding to 421151013235531 its reverse (135532310151124), we get a palindrome (556683323386655).

The spelling of 421151013235531 in words is "four hundred twenty-one trillion, one hundred fifty-one billion, thirteen million, two hundred thirty-five thousand, five hundred thirty-one".