51222726 has 64 divisors (see below), whose sum is σ = 120821760. Its totient is φ = 16057440.

The previous prime is 51222709. The next prime is 51222733. The reversal of 51222726 is 62722215.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 51222726.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 61525 + ... + 62351.

It is an arithmetic number, because the mean of its divisors is an integer number (1887840).

Almost surely, 2^51222726 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51222726, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60410880).

51222726 is an abundant number, since it is smaller than the sum of its proper divisors (69599034).

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

51222726 is a wasteful number, since it uses less digits than its factorization.

51222726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906 (or 900 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 51222726 is about 7157.0053793469. The cubic root of 51222726 is about 371.3820385352.

The spelling of 51222726 in words is "fifty-one million, two hundred twenty-two thousand, seven hundred twenty-six".