51440147 has 16 divisors (see below), whose sum is σ = 59875200. Its totient is φ = 43674240.

The previous prime is 51440111. The next prime is 51440149. The reversal of 51440147 is 74104415.

It is a cyclic number.

It is not a de Polignac number, because 51440147 - 2¹⁴ = 51423763 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51440149) 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 15 ways as a sum of consecutive naturals, for example, 25004 + ... + 26982.

It is an arithmetic number, because the mean of its divisors is an integer number (3742200).

Almost surely, 2^51440147 is an apocalyptic number.

51440147 is a deficient number, since it is larger than the sum of its proper divisors (8435053).

51440147 is a wasteful number, since it uses less digits than its factorization.

51440147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2146.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 51440147 is about 7172.1786787558. The cubic root of 51440147 is about 371.9067553515.

The spelling of 51440147 in words is "fifty-one million, four hundred forty thousand, one hundred forty-seven".