51210146 has 16 divisors (see below), whose sum is σ = 84961464. Its totient is φ = 22996224.

The previous prime is 51210113. The next prime is 51210151. The reversal of 51210146 is 64101215.

51210146 = 93² + 94² + ... + 536².

51210146 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 31753225 + 19456921 = 5635^2 + 4411^2 .

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 25655 + ... + 27578.

Almost surely, 2^51210146 is an apocalyptic number.

51210146 is a deficient number, since it is larger than the sum of its proper divisors (33751318).

51210146 is a wasteful number, since it uses less digits than its factorization.

51210146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53285.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 51210146 is about 7156.1264661827. The cubic root of 51210146 is about 371.3516329650.

The spelling of 51210146 in words is "fifty-one million, two hundred ten thousand, one hundred forty-six".