51767626 has 4 divisors (see below), whose sum is σ = 77651442. Its totient is φ = 25883812.

The previous prime is 51767623. The next prime is 51767627. The reversal of 51767626 is 62676715.

It is a happy number.

51767626 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 62676715 = 5 ⋅12535343.

It can be written as a sum of positive squares in only one way, i.e., 50765625 + 1002001 = 7125^2 + 1001^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (51767621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12941905 + ... + 12941908.

Almost surely, 2^51767626 is an apocalyptic number.

51767626 is the 4551-st centered pentagonal number.

51767626 is a deficient number, since it is larger than the sum of its proper divisors (25883816).

51767626 is a wasteful number, since it uses less digits than its factorization.

51767626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25883815.

The product of its digits is 105840, while the sum is 40.

The square root of 51767626 is about 7194.9722723580. The cubic root of 51767626 is about 372.6942991868.

The spelling of 51767626 in words is "fifty-one million, seven hundred sixty-seven thousand, six hundred twenty-six".