51505125 has 48 divisors (see below), whose sum is σ = 99732672. Its totient is φ = 23536800.

The previous prime is 51505123. The next prime is 51505127. The reversal of 51505125 is 52150515.

It is an interprime number because it is at equal distance from previous prime (51505123) and next prime (51505127).

It is not a de Polignac number, because 51505125 - 2¹ = 51505123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51505095 and 51505104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51505123) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 16974 + ... + 19776.

It is an arithmetic number, because the mean of its divisors is an integer number (2077764).

Almost surely, 2^51505125 is an apocalyptic number.

It is an amenable number.

51505125 is a deficient number, since it is larger than the sum of its proper divisors (48227547).

51505125 is a wasteful number, since it uses less digits than its factorization.

51505125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2835 (or 2818 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 51505125 is about 7176.7071139904. The cubic root of 51505125 is about 372.0632841232.

The spelling of 51505125 in words is "fifty-one million, five hundred five thousand, one hundred twenty-five".