71222951 has 4 divisors (see below), whose sum is σ = 71247504. Its totient is φ = 71198400.

The previous prime is 71222947. The next prime is 71222953. The reversal of 71222951 is 15922217.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71222951 - 2² = 71222947 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71222953) 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, 7235 + ... + 13956.

It is an arithmetic number, because the mean of its divisors is an integer number (17811876).

Almost surely, 2^71222951 is an apocalyptic number.

71222951 is a deficient number, since it is larger than the sum of its proper divisors (24553).

71222951 is a wasteful number, since it uses less digits than its factorization.

71222951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24552.

The product of its digits is 2520, while the sum is 29.

The square root of 71222951 is about 8439.3691114917. The cubic root of 71222951 is about 414.5147490317.

The spelling of 71222951 in words is "seventy-one million, two hundred twenty-two thousand, nine hundred fifty-one".