51722364 has 48 divisors (see below), whose sum is σ = 129620736. Its totient is φ = 15993600.

The previous prime is 51722357. The next prime is 51722371. The reversal of 51722364 is 46322715.

51722364 = T₁₁₀ + T₁₁₁ + ... + T₆₇₇.

51722364 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51722357) and next prime (51722371).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12699 + ... + 16269.

It is an arithmetic number, because the mean of its divisors is an integer number (2700432).

Almost surely, 2^51722364 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51722364, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64810368).

51722364 is an abundant number, since it is smaller than the sum of its proper divisors (77898372).

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

51722364 is a wasteful number, since it uses less digits than its factorization.

51722364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3666 (or 3664 counting only the distinct ones).

The product of its digits is 10080, while the sum is 30.

The square root of 51722364 is about 7191.8261936729. The cubic root of 51722364 is about 372.5856482184.

The spelling of 51722364 in words is "fifty-one million, seven hundred twenty-two thousand, three hundred sixty-four".