1631425541 has 8 divisors (see below), whose sum is σ = 1665425400. Its totient is φ = 1597659840.

The previous prime is 1631425459. The next prime is 1631425577. The reversal of 1631425541 is 1455241361.

It can be written as a sum of positive squares in 4 ways, for example, as 73441 + 1631352100 = 271^2 + 40390^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1631425541 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1631425498 and 1631425507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1631425591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44426 + ... + 72363.

It is an arithmetic number, because the mean of its divisors is an integer number (208178175).

Almost surely, 2^1631425541 is an apocalyptic number.

It is an amenable number.

1631425541 is a deficient number, since it is larger than the sum of its proper divisors (33999859).

1631425541 is a wasteful number, since it uses less digits than its factorization.

1631425541 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117079.

The product of its digits is 14400, while the sum is 32.

The square root of 1631425541 is about 40390.9091380721. The cubic root of 1631425541 is about 1177.2149056080.

The spelling of 1631425541 in words is "one billion, six hundred thirty-one million, four hundred twenty-five thousand, five hundred forty-one".