425515885 has 4 divisors (see below), whose sum is σ = 510619068. Its totient is φ = 340412704.

The previous prime is 425515877. The next prime is 425515921. The reversal of 425515885 is 588515524.

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

It can be written as a sum of positive squares in 2 ways, for example, as 143376676 + 282139209 = 11974^2 + 16797^2 .

It is a cyclic number.

It is not a de Polignac number, because 425515885 - 2³ = 425515877 is a prime.

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 3 ways as a sum of consecutive naturals, for example, 42551584 + ... + 42551593.

It is an arithmetic number, because the mean of its divisors is an integer number (127654767).

Almost surely, 2^425515885 is an apocalyptic number.

It is an amenable number.

425515885 is a deficient number, since it is larger than the sum of its proper divisors (85103183).

425515885 is an equidigital number, since it uses as much as digits as its factorization.

425515885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85103182.

The product of its digits is 320000, while the sum is 43.

The square root of 425515885 is about 20628.0363825547. The cubic root of 425515885 is about 752.1513843081.

The spelling of 425515885 in words is "four hundred twenty-five million, five hundred fifteen thousand, eight hundred eighty-five".