425227181 has 4 divisors (see below), whose sum is σ = 426320700. Its totient is φ = 424133664.

The previous prime is 425227141. The next prime is 425227183. The reversal of 425227181 is 181722524.

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 259693225 + 165533956 = 16115^2 + 12866^2 .

It is a cyclic number.

It is not a de Polignac number, because 425227181 - 2²² = 421032877 is a prime.

It is a super-4 number, since 4×425227181⁴ (a number of 36 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (425227183) 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, 546176 + ... + 546953.

It is an arithmetic number, because the mean of its divisors is an integer number (106580175).

Almost surely, 2^425227181 is an apocalyptic number.

It is an amenable number.

425227181 is a deficient number, since it is larger than the sum of its proper divisors (1093519).

425227181 is a wasteful number, since it uses less digits than its factorization.

425227181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1093518.

The product of its digits is 8960, while the sum is 32.

The square root of 425227181 is about 20621.0373405413. The cubic root of 425227181 is about 751.9812392756.

The spelling of 425227181 in words is "four hundred twenty-five million, two hundred twenty-seven thousand, one hundred eighty-one".