51380248 has 8 divisors (see below), whose sum is σ = 96337980. Its totient is φ = 25690120.

The previous prime is 51380233. The next prime is 51380249. The reversal of 51380248 is 84208315.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51380249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3211258 + ... + 3211273.

Almost surely, 2^51380248 is an apocalyptic number.

It is an amenable number.

51380248 is a deficient number, since it is larger than the sum of its proper divisors (44957732).

51380248 is a wasteful number, since it uses less digits than its factorization.

51380248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6422537 (or 6422533 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 51380248 is about 7168.0016741069. The cubic root of 51380248 is about 371.7623448322.

The spelling of 51380248 in words is "fifty-one million, three hundred eighty thousand, two hundred forty-eight".