51534218 has 16 divisors (see below), whose sum is σ = 80364960. Its totient is φ = 24754800.

The previous prime is 51534211. The next prime is 51534227. The reversal of 51534218 is 81243515.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51534211) 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 7 ways as a sum of consecutive naturals, for example, 10133 + ... + 14343.

It is an arithmetic number, because the mean of its divisors is an integer number (5022810).

Almost surely, 2^51534218 is an apocalyptic number.

51534218 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

51534218 is a deficient number, since it is larger than the sum of its proper divisors (28830742).

51534218 is a wasteful number, since it uses less digits than its factorization.

51534218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4453.

The product of its digits is 4800, while the sum is 29.

The square root of 51534218 is about 7178.7337323514. The cubic root of 51534218 is about 372.1333250474.

The spelling of 51534218 in words is "fifty-one million, five hundred thirty-four thousand, two hundred eighteen".