51542244 has 72 divisors (see below), whose sum is σ = 145541760. Its totient is φ = 15855264.

The previous prime is 51542203. The next prime is 51542261. The reversal of 51542244 is 44224515.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10597 + ... + 14675.

Almost surely, 2^51542244 is an apocalyptic number.

51542244 is a gapful number since it is divisible by the number (54) 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 51542244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72770880).

51542244 is an abundant number, since it is smaller than the sum of its proper divisors (93999516).

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

51542244 is a wasteful number, since it uses less digits than its factorization.

51542244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111 (or 4097 counting only the distinct ones).

The product of its digits is 6400, while the sum is 27.

The square root of 51542244 is about 7179.2927228244. The cubic root of 51542244 is about 372.1526428725.

Adding to 51542244 its reverse (44224515), we get a palindrome (95766759).

The spelling of 51542244 in words is "fifty-one million, five hundred forty-two thousand, two hundred forty-four".