425215531 has 16 divisors (see below), whose sum is σ = 463494528. Its totient is φ = 387763200.

The previous prime is 425215529. The next prime is 425215589. The reversal of 425215531 is 135512524.

It is a cyclic number.

It is not a de Polignac number, because 425215531 - 2¹ = 425215529 is a prime.

It is a super-2 number, since 2×425215531² = 361616495607223922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 425215531.

It is not an unprimeable number, because it can be changed into a prime (425215591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482211 + ... + 483091.

It is an arithmetic number, because the mean of its divisors is an integer number (28968408).

Almost surely, 2^425215531 is an apocalyptic number.

425215531 is a deficient number, since it is larger than the sum of its proper divisors (38278997).

425215531 is a wasteful number, since it uses less digits than its factorization.

425215531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1302.

The product of its digits is 6000, while the sum is 28.

The square root of 425215531 is about 20620.7548600918. The cubic root of 425215531 is about 751.9743718396.

The spelling of 425215531 in words is "four hundred twenty-five million, two hundred fifteen thousand, five hundred thirty-one".