51520343 has 8 divisors (see below), whose sum is σ = 61979520. Its totient is φ = 41835960.

The previous prime is 51520333. The next prime is 51520349. The reversal of 51520343 is 34302515.

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

It is a cyclic number.

It is not a de Polignac number, because 51520343 - 2¹⁶ = 51454807 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51520349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 193553 + ... + 193818.

It is an arithmetic number, because the mean of its divisors is an integer number (7747440).

Almost surely, 2^51520343 is an apocalyptic number.

51520343 is a deficient number, since it is larger than the sum of its proper divisors (10459177).

51520343 is a wasteful number, since it uses less digits than its factorization.

51520343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387397.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 51520343 is about 7177.7672712341. The cubic root of 51520343 is about 372.0999244996.

Adding to 51520343 its reverse (34302515), we get a palindrome (85822858).

The spelling of 51520343 in words is "fifty-one million, five hundred twenty thousand, three hundred forty-three".