51622272 has 160 divisors (see below), whose sum is σ = 165876480. Its totient is φ = 15842304.

The previous prime is 51622213. The next prime is 51622273. The reversal of 51622272 is 27222615.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51622273) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 134593 + ... + 134975.

It is an arithmetic number, because the mean of its divisors is an integer number (1036728).

Almost surely, 2^51622272 is an apocalyptic number.

51622272 is a gapful number since it is divisible by the number (52) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51622272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82938240).

51622272 is an abundant number, since it is smaller than the sum of its proper divisors (114254208).

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

51622272 is a wasteful number, since it uses less digits than its factorization.

51622272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422 (or 401 counting only the distinct ones).

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

The square root of 51622272 is about 7184.8640905726. The cubic root of 51622272 is about 372.3451531223.

Adding to 51622272 its reverse (27222615), we get a palindrome (78844887).

The spelling of 51622272 in words is "fifty-one million, six hundred twenty-two thousand, two hundred seventy-two".