51648446 has 4 divisors (see below), whose sum is σ = 77472672. Its totient is φ = 25824222.

The previous prime is 51648439. The next prime is 51648463. The reversal of 51648446 is 64484615.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12912110 + ... + 12912113.

It is an arithmetic number, because the mean of its divisors is an integer number (19368168).

Almost surely, 2^51648446 is an apocalyptic number.

51648446 is a deficient number, since it is larger than the sum of its proper divisors (25824226).

51648446 is a wasteful number, since it uses less digits than its factorization.

51648446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25824225.

The product of its digits is 92160, while the sum is 38.

The square root of 51648446 is about 7186.6853277432. The cubic root of 51648446 is about 372.4080724463.

The spelling of 51648446 in words is "fifty-one million, six hundred forty-eight thousand, four hundred forty-six".