51224145 has 32 divisors (see below), whose sum is σ = 99180288. Its totient is φ = 22038528.

The previous prime is 51224101. The next prime is 51224161. The reversal of 51224145 is 54142215.

51224145 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 51224145 - 2⁶ = 51224081 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 12564 + ... + 16133.

It is an arithmetic number, because the mean of its divisors is an integer number (3099384).

Almost surely, 2^51224145 is an apocalyptic number.

It is an amenable number.

51224145 is a deficient number, since it is larger than the sum of its proper divisors (47956143).

51224145 is a wasteful number, since it uses less digits than its factorization.

51224145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28729.

The product of its digits is 1600, while the sum is 24.

The square root of 51224145 is about 7157.1045123010. The cubic root of 51224145 is about 371.3854679130.

The spelling of 51224145 in words is "fifty-one million, two hundred twenty-four thousand, one hundred forty-five".