51722617 has 16 divisors (see below), whose sum is σ = 55944000. Its totient is φ = 47672064.

The previous prime is 51722611. The next prime is 51722621. The reversal of 51722617 is 71622715.

It is not a de Polignac number, because 51722617 - 2²³ = 43334009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51722611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 123234 + ... + 123652.

It is an arithmetic number, because the mean of its divisors is an integer number (3496500).

Almost surely, 2^51722617 is an apocalyptic number.

It is an amenable number.

51722617 is a deficient number, since it is larger than the sum of its proper divisors (4221383).

51722617 is a wasteful number, since it uses less digits than its factorization.

51722617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600.

The product of its digits is 5880, while the sum is 31.

The square root of 51722617 is about 7191.8437830643. The cubic root of 51722617 is about 372.5862557185.

The spelling of 51722617 in words is "fifty-one million, seven hundred twenty-two thousand, six hundred seventeen".