425531215 has 4 divisors (see below), whose sum is σ = 510637464. Its totient is φ = 340424968.

The previous prime is 425531207. The next prime is 425531221. The reversal of 425531215 is 512135524.

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 425531215 - 2³ = 425531207 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42553117 + ... + 42553126.

It is an arithmetic number, because the mean of its divisors is an integer number (127659366).

Almost surely, 2^425531215 is an apocalyptic number.

425531215 is a deficient number, since it is larger than the sum of its proper divisors (85106249).

425531215 is an equidigital number, since it uses as much as digits as its factorization.

425531215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85106248.

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

The square root of 425531215 is about 20628.4079608679. The cubic root of 425531215 is about 752.1604167498.

Adding to 425531215 its reverse (512135524), we get a palindrome (937666739).

The spelling of 425531215 in words is "four hundred twenty-five million, five hundred thirty-one thousand, two hundred fifteen".