51382473 has 4 divisors (see below), whose sum is σ = 68509968. Its totient is φ = 34254980.

The previous prime is 51382447. The next prime is 51382481. The reversal of 51382473 is 37428315.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51382473 - 2⁸ = 51382217 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51382433) 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, 8563743 + ... + 8563748.

It is an arithmetic number, because the mean of its divisors is an integer number (17127492).

Almost surely, 2^51382473 is an apocalyptic number.

It is an amenable number.

51382473 is a deficient number, since it is larger than the sum of its proper divisors (17127495).

51382473 is a wasteful number, since it uses less digits than its factorization.

51382473 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17127494.

The product of its digits is 20160, while the sum is 33.

The square root of 51382473 is about 7168.1568760735. The cubic root of 51382473 is about 371.7677110920.

The spelling of 51382473 in words is "fifty-one million, three hundred eighty-two thousand, four hundred seventy-three".