425631081 has 8 divisors (see below), whose sum is σ = 567952864. Its totient is φ = 283531680.

The previous prime is 425631067. The next prime is 425631097. The reversal of 425631081 is 180136524.

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

It is not a de Polignac number, because 425631081 - 2¹⁹ = 425106793 is a prime.

It is a super-2 number, since 2×425631081² = 362323634226457122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (425431081) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 51076 + ... + 58821.

It is an arithmetic number, because the mean of its divisors is an integer number (70994108).

Almost surely, 2^425631081 is an apocalyptic number.

It is an amenable number.

425631081 is a deficient number, since it is larger than the sum of its proper divisors (142321783).

425631081 is a wasteful number, since it uses less digits than its factorization.

425631081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111191.

The product of its (nonzero) digits is 5760, while the sum is 30.

The square root of 425631081 is about 20630.8284128389. The cubic root of 425631081 is about 752.2192525250.

The spelling of 425631081 in words is "four hundred twenty-five million, six hundred thirty-one thousand, eighty-one".