361031081 has 4 divisors (see below), whose sum is σ = 365087700. Its totient is φ = 356974464.

The previous prime is 361031059. The next prime is 361031093. The reversal of 361031081 is 180130163.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 180130163 = 1669 ⋅107927.

It can be written as a sum of positive squares in 2 ways, for example, as 106915600 + 254115481 = 10340^2 + 15941^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-361031081 is a prime.

It is a super-2 number, since 2×361031081² = 260686882896057122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (361031051) 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, 2028176 + ... + 2028353.

It is an arithmetic number, because the mean of its divisors is an integer number (91271925).

Almost surely, 2^361031081 is an apocalyptic number.

It is an amenable number.

361031081 is a deficient number, since it is larger than the sum of its proper divisors (4056619).

361031081 is an equidigital number, since it uses as much as digits as its factorization.

361031081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4056618.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 361031081 is about 19000.8179034483. The cubic root of 361031081 is about 712.0571700349.

The spelling of 361031081 in words is "three hundred sixty-one million, thirty-one thousand, eighty-one".