51447254 has 4 divisors (see below), whose sum is σ = 77170884. Its totient is φ = 25723626.

The previous prime is 51447211. The next prime is 51447257. The reversal of 51447254 is 45274415.

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

It is a self number, because there is not a number n which added to its sum of digits gives 51447254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51447257) 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 as a sum of consecutive naturals, namely, 12861812 + ... + 12861815.

It is an arithmetic number, because the mean of its divisors is an integer number (19292721).

Almost surely, 2^51447254 is an apocalyptic number.

51447254 is a deficient number, since it is larger than the sum of its proper divisors (25723630).

51447254 is a wasteful number, since it uses less digits than its factorization.

51447254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25723629.

The product of its digits is 22400, while the sum is 32.

The square root of 51447254 is about 7172.6741177890. The cubic root of 51447254 is about 371.9238821791.

The spelling of 51447254 in words is "fifty-one million, four hundred forty-seven thousand, two hundred fifty-four".