51023238 has 64 divisors (see below), whose sum is σ = 121858560. Its totient is φ = 13934592.

The previous prime is 51023237. The next prime is 51023257. The reversal of 51023238 is 83232015.

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 pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 198406 + ... + 198662.

It is an arithmetic number, because the mean of its divisors is an integer number (1904040).

Almost surely, 2^51023238 is an apocalyptic number.

51023238 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51023238, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60929280).

51023238 is an abundant number, since it is smaller than the sum of its proper divisors (70835322).

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

51023238 is a wasteful number, since it uses less digits than its factorization.

51023238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461.

The product of its (nonzero) digits is 1440, while the sum is 24.

The square root of 51023238 is about 7143.0552286819. The cubic root of 51023238 is about 370.8992928780.

The spelling of 51023238 in words is "fifty-one million, twenty-three thousand, two hundred thirty-eight".