71748331 has 4 divisors (see below), whose sum is σ = 71839152. Its totient is φ = 71657512.

The previous prime is 71748323. The next prime is 71748337. The reversal of 71748331 is 13384717.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13384717 = 239 ⋅56003.

It is a cyclic number.

It is not a de Polignac number, because 71748331 - 2³ = 71748323 is a prime.

It is a super-2 number, since 2×71748331² = 10295646002571122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71748337) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44215 + ... + 45808.

It is an arithmetic number, because the mean of its divisors is an integer number (17959788).

Almost surely, 2^71748331 is an apocalyptic number.

71748331 is a deficient number, since it is larger than the sum of its proper divisors (90821).

71748331 is an equidigital number, since it uses as much as digits as its factorization.

71748331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90820.

The product of its digits is 14112, while the sum is 34.

The square root of 71748331 is about 8470.4386545208. The cubic root of 71748331 is about 415.5314833677.

The spelling of 71748331 in words is "seventy-one million, seven hundred forty-eight thousand, three hundred thirty-one".