51974385 has 8 divisors (see below), whose sum is σ = 83159040. Its totient is φ = 27719664.

The previous prime is 51974371. The next prime is 51974393. The reversal of 51974385 is 58347915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51974385 - 2⁸ = 51974129 is a prime.

It is a super-2 number, since 2×51974385² = 5402673392256450, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 1732465 + ... + 1732494.

It is an arithmetic number, because the mean of its divisors is an integer number (10394880).

Almost surely, 2^51974385 is an apocalyptic number.

It is an amenable number.

51974385 is a deficient number, since it is larger than the sum of its proper divisors (31184655).

51974385 is a wasteful number, since it uses less digits than its factorization.

51974385 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3464967.

The product of its digits is 151200, while the sum is 42.

The square root of 51974385 is about 7209.3262514607. The cubic root of 51974385 is about 373.1898182610.

The spelling of 51974385 in words is "fifty-one million, nine hundred seventy-four thousand, three hundred eighty-five".