51520373 has 2 divisors, whose sum is σ = 51520374. Its totient is φ = 51520372.

The previous prime is 51520367. The next prime is 51520379. The reversal of 51520373 is 37302515.

It is a balanced prime because it is at equal distance from previous prime (51520367) and next prime (51520379).

It can be written as a sum of positive squares in only one way, i.e., 32001649 + 19518724 = 5657^2 + 4418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51520373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51520379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25760186 + 25760187.

It is an arithmetic number, because the mean of its divisors is an integer number (25760187).

Almost surely, 2^51520373 is an apocalyptic number.

It is an amenable number.

51520373 is a deficient number, since it is larger than the sum of its proper divisors (1).

51520373 is an equidigital number, since it uses as much as digits as its factorization.

51520373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3150, while the sum is 26.

The square root of 51520373 is about 7177.7693610202. The cubic root of 51520373 is about 372.0999967234.

Adding to 51520373 its reverse (37302515), we get a palindrome (88822888).

The spelling of 51520373 in words is "fifty-one million, five hundred twenty thousand, three hundred seventy-three".