51023232 has 96 divisors (see below), whose sum is σ = 158165280. Its totient is φ = 15694848.

The previous prime is 51023221. The next prime is 51023233. The reversal of 51023232 is 23232015.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51023233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13273 + ... + 16679.

It is an arithmetic number, because the mean of its divisors is an integer number (1647555).

Almost surely, 2^51023232 is an apocalyptic number.

51023232 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 51023232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79082640).

51023232 is an abundant number, since it is smaller than the sum of its proper divisors (107142048).

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

51023232 is a wasteful number, since it uses less digits than its factorization.

51023232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3440 (or 3425 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 51023232 is about 7143.0548086935. The cubic root of 51023232 is about 370.8992783395.

Adding to 51023232 its reverse (23232015), we get a palindrome (74255247).

The spelling of 51023232 in words is "fifty-one million, twenty-three thousand, two hundred thirty-two".