51610651 has 4 divisors (see below), whose sum is σ = 51872832. Its totient is φ = 51348472.

The previous prime is 51610649. The next prime is 51610661. The reversal of 51610651 is 15601615.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15601615 = 5 ⋅3120323.

It is a cyclic number.

It is not a de Polignac number, because 51610651 - 2¹ = 51610649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51610661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130795 + ... + 131188.

It is an arithmetic number, because the mean of its divisors is an integer number (12968208).

Almost surely, 2^51610651 is an apocalyptic number.

51610651 is a deficient number, since it is larger than the sum of its proper divisors (262181).

51610651 is a wasteful number, since it uses less digits than its factorization.

51610651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262180.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 51610651 is about 7184.0553310787. The cubic root of 51610651 is about 372.3172107402.

The spelling of 51610651 in words is "fifty-one million, six hundred ten thousand, six hundred fifty-one".