51352540 has 12 divisors (see below), whose sum is σ = 107840376. Its totient is φ = 20541008.

The previous prime is 51352531. The next prime is 51352549. The reversal of 51352540 is 4525315.

It is an interprime number because it is at equal distance from previous prime (51352531) and next prime (51352549).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51352549) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1283794 + ... + 1283833.

It is an arithmetic number, because the mean of its divisors is an integer number (8986698).

Almost surely, 2^51352540 is an apocalyptic number.

It is an amenable number.

51352540 is an abundant number, since it is smaller than the sum of its proper divisors (56487836).

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

51352540 is a wasteful number, since it uses less digits than its factorization.

51352540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2567636 (or 2567634 counting only the distinct ones).

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

The square root of 51352540 is about 7166.0686572206. The cubic root of 51352540 is about 371.6955056371.

Adding to 51352540 its reverse (4525315), we get a palindrome (55877855).

The spelling of 51352540 in words is "fifty-one million, three hundred fifty-two thousand, five hundred forty".