51006501 has 96 divisors (see below), whose sum is σ = 97843200. Its totient is φ = 25401600.

The previous prime is 51006493. The next prime is 51006509. The reversal of 51006501 is 10560015.

51006501 is a `hidden beast` number, since 5 + 10 + 0 + 650 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (51006493) and next prime (51006509).

It is not a de Polignac number, because 51006501 - 2³ = 51006493 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51006509) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1244041 + ... + 1244081.

It is an arithmetic number, because the mean of its divisors is an integer number (1019200).

Almost surely, 2^51006501 is an apocalyptic number.

It is an amenable number.

51006501 is a deficient number, since it is larger than the sum of its proper divisors (46836699).

51006501 is a wasteful number, since it uses less digits than its factorization.

51006501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 95 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 18.

The square root of 51006501 is about 7141.8835750802. The cubic root of 51006501 is about 370.8587334479.

Adding to 51006501 its reverse (10560015), we get a palindrome (61566516).

The spelling of 51006501 in words is "fifty-one million, six thousand, five hundred one".