31225425145 has 16 divisors (see below), whose sum is σ = 38430381312. Its totient is φ = 24346670400.

The previous prime is 31225425131. The next prime is 31225425169. The reversal of 31225425145 is 54152452213.

It is a happy number.

It is not a de Polignac number, because 31225425145 - 2⁷ = 31225425017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31225425145.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 350157 + ... + 430186.

It is an arithmetic number, because the mean of its divisors is an integer number (2401898832).

Almost surely, 2^31225425145 is an apocalyptic number.

It is an amenable number.

31225425145 is a deficient number, since it is larger than the sum of its proper divisors (7204956167).

31225425145 is a wasteful number, since it uses less digits than its factorization.

31225425145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 780552.

The product of its digits is 48000, while the sum is 34.

Adding to 31225425145 its reverse (54152452213), we get a palindrome (85377877358).

The spelling of 31225425145 in words is "thirty-one billion, two hundred twenty-five million, four hundred twenty-five thousand, one hundred forty-five".