3161621045 has 16 divisors (see below), whose sum is σ = 4147383168. Its totient is φ = 2294619840.

The previous prime is 3161621041. The next prime is 3161621063. The reversal of 3161621045 is 5401261613.

It is a happy number.

It is not a de Polignac number, because 3161621045 - 2² = 3161621041 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3161620999 and 3161621017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3161621041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32234 + ... + 85803.

It is an arithmetic number, because the mean of its divisors is an integer number (259211448).

Almost surely, 2^3161621045 is an apocalyptic number.

It is an amenable number.

3161621045 is a deficient number, since it is larger than the sum of its proper divisors (985762123).

3161621045 is a wasteful number, since it uses less digits than its factorization.

3161621045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118540.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 3161621045 is about 56228.2939897700. The cubic root of 3161621045 is about 1467.6976693353.

Adding to 3161621045 its reverse (5401261613), we get a palindrome (8562882658).

The spelling of 3161621045 in words is "three billion, one hundred sixty-one million, six hundred twenty-one thousand, forty-five".