71603231 has 16 divisors (see below), whose sum is σ = 84424704. Its totient is φ = 59457024.

The previous prime is 71603219. The next prime is 71603239. The reversal of 71603231 is 13230617.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 71603231 - 2¹⁰ = 71602207 is a prime.

It is a super-2 number, since 2×71603231² = 10254045379278722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71603197 and 71603206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71603239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32831 + ... + 34943.

It is an arithmetic number, because the mean of its divisors is an integer number (5276544).

Almost surely, 2^71603231 is an apocalyptic number.

71603231 is a deficient number, since it is larger than the sum of its proper divisors (12821473).

71603231 is a wasteful number, since it uses less digits than its factorization.

71603231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270.

The product of its (nonzero) digits is 756, while the sum is 23.

The square root of 71603231 is about 8461.8692379403. The cubic root of 71603231 is about 415.2511780840.

Adding to 71603231 its reverse (13230617), we get a palindrome (84833848).

The spelling of 71603231 in words is "seventy-one million, six hundred three thousand, two hundred thirty-one".