51423478 has 12 divisors (see below), whose sum is σ = 77771340. Its totient is φ = 25500636.

The previous prime is 51423473. The next prime is 51423517. The reversal of 51423478 is 87432415.

Its product of digits (26880) is a multiple of the sum of its prime divisors (560).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51423473) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 135493 + ... + 135871.

It is an arithmetic number, because the mean of its divisors is an integer number (6480945).

Almost surely, 2^51423478 is an apocalyptic number.

51423478 is a deficient number, since it is larger than the sum of its proper divisors (26347862).

51423478 is an equidigital number, since it uses as much as digits as its factorization.

51423478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 939 (or 560 counting only the distinct ones).

The product of its digits is 26880, while the sum is 34.

The square root of 51423478 is about 7171.0165248729. The cubic root of 51423478 is about 371.8665793164.

The spelling of 51423478 in words is "fifty-one million, four hundred twenty-three thousand, four hundred seventy-eight".