51723126 has 108 divisors (see below), whose sum is σ = 141569532. Its totient is φ = 13601952.

The previous prime is 51723107. The next prime is 51723127. The reversal of 51723126 is 62132715.

It is a happy number.

51723126 is a `hidden beast` number, since 517 + 23 + 126 = 666.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 51723126.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51723127) by changing a digit.

It is a polite number, since it can be written in 53 ways as a sum of consecutive naturals, for example, 148885 + ... + 149231.

It is an arithmetic number, because the mean of its divisors is an integer number (1310829).

Almost surely, 2^51723126 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51723126, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70784766).

51723126 is an abundant number, since it is smaller than the sum of its proper divisors (89846406).

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

51723126 is a wasteful number, since it uses less digits than its factorization.

51723126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 395 (or 372 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 51723126 is about 7191.8791702864. The cubic root of 51723126 is about 372.5874779161.

The spelling of 51723126 in words is "fifty-one million, seven hundred twenty-three thousand, one hundred twenty-six".