361965521 has 8 divisors (see below), whose sum is σ = 368262888. Its totient is φ = 355680000.

The previous prime is 361965511. The next prime is 361965533. The reversal of 361965521 is 125569163.

It can be written as a sum of positive squares in 4 ways, for example, as 46512400 + 315453121 = 6820^2 + 17761^2 .

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-361965521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (361965511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77081 + ... + 81641.

It is an arithmetic number, because the mean of its divisors is an integer number (46032861).

Almost surely, 2^361965521 is an apocalyptic number.

It is an amenable number.

361965521 is a deficient number, since it is larger than the sum of its proper divisors (6297367).

361965521 is a wasteful number, since it uses less digits than its factorization.

361965521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5923.

The product of its digits is 48600, while the sum is 38.

The square root of 361965521 is about 19025.3914808605. The cubic root of 361965521 is about 712.6709689644.

The spelling of 361965521 in words is "three hundred sixty-one million, nine hundred sixty-five thousand, five hundred twenty-one".