51656149 has 12 divisors (see below), whose sum is σ = 56055744. Its totient is φ = 47570624.

The previous prime is 51656131. The next prime is 51656179. The reversal of 51656149 is 94165615.

51656149 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51656149 - 2¹¹ = 51654101 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51656119) 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 in 11 ways as a sum of consecutive naturals, for example, 11682 + ... + 15484.

It is an arithmetic number, because the mean of its divisors is an integer number (4671312).

Almost surely, 2^51656149 is an apocalyptic number.

It is an amenable number.

51656149 is a deficient number, since it is larger than the sum of its proper divisors (4399595).

51656149 is a wasteful number, since it uses less digits than its factorization.

51656149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3884 (or 3867 counting only the distinct ones).

The product of its digits is 32400, while the sum is 37.

The square root of 51656149 is about 7187.2212293765. The cubic root of 51656149 is about 372.4265855350.

It can be divided in two parts, 516 and 56149, that added together give a palindrome (56665).

The spelling of 51656149 in words is "fifty-one million, six hundred fifty-six thousand, one hundred forty-nine".