1631041225 has 24 divisors (see below), whose sum is σ = 2322485280. Its totient is φ = 1123776000.

The previous prime is 1631041211. The next prime is 1631041231. The reversal of 1631041225 is 5221401361.

It is a happy number.

It is not a de Polignac number, because 1631041225 - 2²³ = 1622652617 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a self number, because there is not a number n which added to its sum of digits gives 1631041225.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 150856 + ... + 161305.

It is an arithmetic number, because the mean of its divisors is an integer number (96770220).

Almost surely, 2^1631041225 is an apocalyptic number.

It is an amenable number.

1631041225 is a deficient number, since it is larger than the sum of its proper divisors (691444055).

1631041225 is a wasteful number, since it uses less digits than its factorization.

1631041225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 312201 (or 312196 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1631041225 is about 40386.1514011920. The cubic root of 1631041225 is about 1177.1224592489.

Adding to 1631041225 its reverse (5221401361), we get a palindrome (6852442586).

The spelling of 1631041225 in words is "one billion, six hundred thirty-one million, forty-one thousand, two hundred twenty-five".