51212648 has 16 divisors (see below), whose sum is σ = 96290880. Its totient is φ = 25535088.

The previous prime is 51212633. The next prime is 51212659. The reversal of 51212648 is 84621215.

It is a super-3 number, since 3×51212648³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51212648.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5786 + ... + 11657.

It is an arithmetic number, because the mean of its divisors is an integer number (6018180).

Almost surely, 2^51212648 is an apocalyptic number.

It is an amenable number.

51212648 is a deficient number, since it is larger than the sum of its proper divisors (45078232).

51212648 is a wasteful number, since it uses less digits than its factorization.

51212648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17816 (or 17812 counting only the distinct ones).

The product of its digits is 3840, while the sum is 29.

The square root of 51212648 is about 7156.3012792923. The cubic root of 51212648 is about 371.3576806380.

The spelling of 51212648 in words is "fifty-one million, two hundred twelve thousand, six hundred forty-eight".