361531 has 2 divisors, whose sum is σ = 361532. Its totient is φ = 361530.

The previous prime is 361523. The next prime is 361541. The reversal of 361531 is 135163.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 361531 - 2³ = 361523 is a prime.

It is a super-2 number, since 2×361531² = 261409327922, which contains 22 as substring.

It is a Chen prime.

It is a nialpdrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 361499 and 361508.

It is not a weakly prime, because it can be changed into another prime (361511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180765 + 180766.

It is an arithmetic number, because the mean of its divisors is an integer number (180766).

2³⁶¹⁵³¹ is an apocalyptic number.

361531 is a deficient number, since it is larger than the sum of its proper divisors (1).

361531 is an equidigital number, since it uses as much as digits as its factorization.

361531 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 270, while the sum is 19.

The square root of 361531 is about 601.2744797511. The cubic root of 361531 is about 71.2385679822.

Adding to 361531 its reverse (135163), we get a palindrome (496694).

The spelling of 361531 in words is "three hundred sixty-one thousand, five hundred thirty-one".