51647954 has 8 divisors (see below), whose sum is σ = 77512140. Its totient is φ = 25810576.

The previous prime is 51647879. The next prime is 51647963. The reversal of 51647954 is 45974615.

It can be written as a sum of positive squares in 2 ways, for example, as 46607929 + 5040025 = 6827^2 + 2245^2 .

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

It is a super-2 number, since 2×51647954² = 5335022304772232, 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 3 ways as a sum of consecutive naturals, for example, 869 + ... + 10200.

Almost surely, 2^51647954 is an apocalyptic number.

51647954 is a deficient number, since it is larger than the sum of its proper divisors (25864186).

51647954 is a wasteful number, since it uses less digits than its factorization.

51647954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13404.

The product of its digits is 151200, while the sum is 41.

The square root of 51647954 is about 7186.6510976949. The cubic root of 51647954 is about 372.4068899303.

It can be divided in two parts, 5 and 1647954, that multiplied together give a triangular number (8239770 = T₄₀₅₉).

The spelling of 51647954 in words is "fifty-one million, six hundred forty-seven thousand, nine hundred fifty-four".