51722685 has 64 divisors (see below), whose sum is σ = 107328000. Its totient is φ = 23623488.

The previous prime is 51722683. The next prime is 51722711. The reversal of 51722685 is 58622715.

It is a happy number.

It is not a de Polignac number, because 51722685 - 2¹ = 51722683 is a prime.

It is a super-2 number, since 2×51722685² = 5350472287218450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51722683) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 45747 + ... + 46863.

It is an arithmetic number, because the mean of its divisors is an integer number (1677000).

Almost surely, 2^51722685 is an apocalyptic number.

It is an amenable number.

51722685 is an abundant number, since it is smaller than the sum of its proper divisors (55605315).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51722685 is a wasteful number, since it uses less digits than its factorization.

51722685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1152 (or 1132 counting only the distinct ones).

The product of its digits is 33600, while the sum is 36.

The square root of 51722685 is about 7191.8485106404. The cubic root of 51722685 is about 372.5864189988.

The spelling of 51722685 in words is "fifty-one million, seven hundred twenty-two thousand, six hundred eighty-five".