425528881 has 4 divisors (see below), whose sum is σ = 426981492. Its totient is φ = 424076272.

The previous prime is 425528869. The next prime is 425528893. The reversal of 425528881 is 188825524.

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

It is an interprime number because it is at equal distance from previous prime (425528869) and next prime (425528893).

It can be written as a sum of positive squares in 2 ways, for example, as 266995600 + 158533281 = 16340^2 + 12591^2 .

It is a cyclic number.

It is not a de Polignac number, because 425528881 - 2⁵ = 425528849 is a prime.

It is a super-2 number, since 2×425528881² = 362149657130224322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (425528801) 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, 725866 + ... + 726451.

It is an arithmetic number, because the mean of its divisors is an integer number (106745373).

Almost surely, 2^425528881 is an apocalyptic number.

It is an amenable number.

425528881 is a deficient number, since it is larger than the sum of its proper divisors (1452611).

425528881 is a wasteful number, since it uses less digits than its factorization.

425528881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1452610.

The product of its digits is 204800, while the sum is 43.

The square root of 425528881 is about 20628.3513883199. The cubic root of 425528881 is about 752.1590415701.

It can be divided in two parts, 425528 and 881, that added together give a square (426409 = 653²).

The spelling of 425528881 in words is "four hundred twenty-five million, five hundred twenty-eight thousand, eight hundred eighty-one".