31225440445 has 8 divisors (see below), whose sum is σ = 37482371640. Its totient is φ = 24972456960.

The previous prime is 31225440443. The next prime is 31225440461. The reversal of 31225440445 is 54404452213.

It can be written as a sum of positive squares in 4 ways, for example, as 13704682489 + 17520757956 = 117067^2 + 132366^2 .

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

It is not a de Polignac number, because 31225440445 - 2¹ = 31225440443 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31225440445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31225440443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 969496 + ... + 1001185.

It is an arithmetic number, because the mean of its divisors is an integer number (4685296455).

Almost surely, 2^31225440445 is an apocalyptic number.

It is an amenable number.

31225440445 is a deficient number, since it is larger than the sum of its proper divisors (6256931195).

31225440445 is a wasteful number, since it uses less digits than its factorization.

31225440445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1973855.

The product of its (nonzero) digits is 76800, while the sum is 34.

Adding to 31225440445 its reverse (54404452213), we get a palindrome (85629892658).

The spelling of 31225440445 in words is "thirty-one billion, two hundred twenty-five million, four hundred forty thousand, four hundred forty-five".