231403037 has 2 divisors, whose sum is σ = 231403038. Its totient is φ = 231403036.

The previous prime is 231403021. The next prime is 231403063. The reversal of 231403037 is 730304132.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 121132036 + 110271001 = 11006^2 + 10501^2 .

It is a cyclic number.

It is not a de Polignac number, because 231403037 - 2⁴ = 231403021 is a prime.

It is a super-3 number, since 3×231403037³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231403937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115701518 + 115701519.

It is an arithmetic number, because the mean of its divisors is an integer number (115701519).

Almost surely, 2^231403037 is an apocalyptic number.

It is an amenable number.

231403037 is a deficient number, since it is larger than the sum of its proper divisors (1).

231403037 is an equidigital number, since it uses as much as digits as its factorization.

231403037 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 23.

The square root of 231403037 is about 15211.9373190925. The cubic root of 231403037 is about 613.9358838715.

Adding to 231403037 its reverse (730304132), we get a palindrome (961707169).

The spelling of 231403037 in words is "two hundred thirty-one million, four hundred three thousand, thirty-seven".