425528815 has 8 divisors (see below), whose sum is σ = 515899440. Its totient is φ = 336913152.

The previous prime is 425528813. The next prime is 425528837. The reversal of 425528815 is 518825524.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 425528815 - 2¹ = 425528813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425528813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 438205 + ... + 439174.

It is an arithmetic number, because the mean of its divisors is an integer number (64487430).

Almost surely, 2^425528815 is an apocalyptic number.

425528815 is a deficient number, since it is larger than the sum of its proper divisors (90370625).

425528815 is an equidigital number, since it uses as much as digits as its factorization.

425528815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877481.

The product of its digits is 128000, while the sum is 40.

The square root of 425528815 is about 20628.3497885798. The cubic root of 425528815 is about 752.1590026832.

The spelling of 425528815 in words is "four hundred twenty-five million, five hundred twenty-eight thousand, eight hundred fifteen".