10381531 has 2 divisors, whose sum is σ = 10381532. Its totient is φ = 10381530.

The previous prime is 10381523. The next prime is 10381541. The reversal of 10381531 is 13518301.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 10381531 - 2³ = 10381523 is a prime.

It is a super-2 number, since 2×10381531² = 215552371807922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10381541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5190765 + 5190766.

It is an arithmetic number, because the mean of its divisors is an integer number (5190766).

Almost surely, 2^10381531 is an apocalyptic number.

10381531 is a deficient number, since it is larger than the sum of its proper divisors (1).

10381531 is an equidigital number, since it uses as much as digits as its factorization.

10381531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 360, while the sum is 22.

The square root of 10381531 is about 3222.0383300017. The cubic root of 10381531 is about 218.1492889267.

Adding to 10381531 its reverse (13518301), we get a palindrome (23899832).

The spelling of 10381531 in words is "ten million, three hundred eighty-one thousand, five hundred thirty-one".