51520453 has 4 divisors (see below), whose sum is σ = 51535168. Its totient is φ = 51505740.

The previous prime is 51520451. The next prime is 51520459. The reversal of 51520453 is 35402515.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 51520453 - 2¹ = 51520451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51520451) 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 3 ways as a sum of consecutive naturals, for example, 1258 + ... + 10228.

It is an arithmetic number, because the mean of its divisors is an integer number (12883792).

Almost surely, 2^51520453 is an apocalyptic number.

It is an amenable number.

51520453 is a deficient number, since it is larger than the sum of its proper divisors (14715).

51520453 is an equidigital number, since it uses as much as digits as its factorization.

51520453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14714.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 51520453 is about 7177.7749337800. The cubic root of 51520453 is about 372.1001893203.

Adding to 51520453 its reverse (35402515), we get a palindrome (86922968).

The spelling of 51520453 in words is "fifty-one million, five hundred twenty thousand, four hundred fifty-three".