361520644231 has 4 divisors (see below), whose sum is σ = 362245135000. Its totient is φ = 360796153464.

The previous prime is 361520644207. The next prime is 361520644253. The reversal of 361520644231 is 132446025163.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-361520644231 is a prime.

It is a super-2 number, since 2×361520644231² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (361520644271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 362244636 + ... + 362245633.

It is an arithmetic number, because the mean of its divisors is an integer number (90561283750).

Almost surely, 2^361520644231 is an apocalyptic number.

361520644231 is a deficient number, since it is larger than the sum of its proper divisors (724490769).

361520644231 is an equidigital number, since it uses as much as digits as its factorization.

361520644231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724490768.

The product of its (nonzero) digits is 103680, while the sum is 37.

Adding to 361520644231 its reverse (132446025163), we get a palindrome (493966669394).

The spelling of 361520644231 in words is "three hundred sixty-one billion, five hundred twenty million, six hundred forty-four thousand, two hundred thirty-one".