51125651 has 4 divisors (see below), whose sum is σ = 51244704. Its totient is φ = 51006600.

The previous prime is 51125639. The next prime is 51125671. The reversal of 51125651 is 15652115.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51125651 is a prime.

It is a super-2 number, since 2×51125651² = 5227664380347602, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51125651.

It is not an unprimeable number, because it can be changed into a prime (51125671) 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, 58880 + ... + 59741.

It is an arithmetic number, because the mean of its divisors is an integer number (12811176).

Almost surely, 2^51125651 is an apocalyptic number.

51125651 is a deficient number, since it is larger than the sum of its proper divisors (119053).

51125651 is a wasteful number, since it uses less digits than its factorization.

51125651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119052.

The product of its digits is 1500, while the sum is 26.

The square root of 51125651 is about 7150.2203462551. The cubic root of 51125651 is about 371.1472813426.

Adding to 51125651 its reverse (15652115), we get a palindrome (66777766).

It can be divided in two parts, 511 and 25651, that added together give a palindrome (26162).

The spelling of 51125651 in words is "fifty-one million, one hundred twenty-five thousand, six hundred fifty-one".