51456046 has 4 divisors (see below), whose sum is σ = 77184072. Its totient is φ = 25728022.

The previous prime is 51456029. The next prime is 51456049. The reversal of 51456046 is 64065415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64065415 = 5 ⋅12813083.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 51455999 and 51456017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51456049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12864010 + ... + 12864013.

It is an arithmetic number, because the mean of its divisors is an integer number (19296018).

Almost surely, 2^51456046 is an apocalyptic number.

51456046 is a deficient number, since it is larger than the sum of its proper divisors (25728026).

51456046 is a wasteful number, since it uses less digits than its factorization.

51456046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25728025.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 51456046 is about 7173.2869732083. The cubic root of 51456046 is about 371.9450674272.

The spelling of 51456046 in words is "fifty-one million, four hundred fifty-six thousand, forty-six".