51520233 has 8 divisors (see below), whose sum is σ = 70909696. Its totient is φ = 33238800.

The previous prime is 51520219. The next prime is 51520247. The reversal of 51520233 is 33202515.

It is an interprime number because it is at equal distance from previous prime (51520219) and next prime (51520247).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51520233 - 2²⁴ = 34743017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51520283) 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 7 ways as a sum of consecutive naturals, for example, 276898 + ... + 277083.

It is an arithmetic number, because the mean of its divisors is an integer number (8863712).

Almost surely, 2^51520233 is an apocalyptic number.

It is an amenable number.

51520233 is a deficient number, since it is larger than the sum of its proper divisors (19389463).

51520233 is a wasteful number, since it uses less digits than its factorization.

51520233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 554015.

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 51520233 is about 7177.7596086801. The cubic root of 51520233 is about 372.0996596785.

Adding to 51520233 its reverse (33202515), we get a palindrome (84722748).

The spelling of 51520233 in words is "fifty-one million, five hundred twenty thousand, two hundred thirty-three".