51928147 has 4 divisors (see below), whose sum is σ = 52027960. Its totient is φ = 51828336.

The previous prime is 51928117. The next prime is 51928153. The reversal of 51928147 is 74182915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51928147 - 2²³ = 43539539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51928117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49122 + ... + 50167.

It is an arithmetic number, because the mean of its divisors is an integer number (13006990).

Almost surely, 2^51928147 is an apocalyptic number.

51928147 is a deficient number, since it is larger than the sum of its proper divisors (99813).

51928147 is an equidigital number, since it uses as much as digits as its factorization.

51928147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99812.

The product of its digits is 20160, while the sum is 37.

The square root of 51928147 is about 7206.1187195327. The cubic root of 51928147 is about 373.0791184078.

It can be divided in two parts, 5192 and 8147, that multiplied together give a palindrome (42299224).

The spelling of 51928147 in words is "fifty-one million, nine hundred twenty-eight thousand, one hundred forty-seven".