71240331 has 8 divisors (see below), whose sum is σ = 95158080. Its totient is φ = 47408072.

The previous prime is 71240243. The next prime is 71240347. The reversal of 71240331 is 13304217.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71240331 - 2²⁵ = 37685899 is a prime.

It is a super-2 number, since 2×71240331² = 10150369521979122, which contains 22 as substring.

It is a nialpdrome in base 14.

It is a junction number, because it is equal to n+sod(n) for n = 71240298 and 71240307.

It is not an unprimeable number, because it can be changed into a prime (71240381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19401 + ... + 22778.

It is an arithmetic number, because the mean of its divisors is an integer number (11894760).

Almost surely, 2^71240331 is an apocalyptic number.

71240331 is a deficient number, since it is larger than the sum of its proper divisors (23917749).

71240331 is a wasteful number, since it uses less digits than its factorization.

71240331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42745.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 71240331 is about 8440.3987465048. The cubic root of 71240331 is about 414.5484632597.

Adding to 71240331 its reverse (13304217), we get a palindrome (84544548).

The spelling of 71240331 in words is "seventy-one million, two hundred forty thousand, three hundred thirty-one".