71651233 has 4 divisors (see below), whose sum is σ = 74766528. Its totient is φ = 68535940.

The previous prime is 71651227. The next prime is 71651249. The reversal of 71651233 is 33215617.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 33215617 = 41 ⋅810137.

It is a cyclic number.

It is not a de Polignac number, because 71651233 - 2²⁵ = 38096801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71651273) 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, 1557613 + ... + 1557658.

It is an arithmetic number, because the mean of its divisors is an integer number (18691632).

Almost surely, 2^71651233 is an apocalyptic number.

It is an amenable number.

71651233 is a deficient number, since it is larger than the sum of its proper divisors (3115295).

71651233 is a wasteful number, since it uses less digits than its factorization.

71651233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3115294.

The product of its digits is 3780, while the sum is 28.

The square root of 71651233 is about 8464.7051336712. The cubic root of 71651233 is about 415.3439505943.

The spelling of 71651233 in words is "seventy-one million, six hundred fifty-one thousand, two hundred thirty-three".