51742245 has 8 divisors (see below), whose sum is σ = 82787616. Its totient is φ = 27595856.

The previous prime is 51742241. The next prime is 51742261. The reversal of 51742245 is 54224715.

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

It is a cyclic number.

It is not a de Polignac number, because 51742245 - 2² = 51742241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51742241) by changing a digit.

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, 1724727 + ... + 1724756.

It is an arithmetic number, because the mean of its divisors is an integer number (10348452).

Almost surely, 2^51742245 is an apocalyptic number.

It is an amenable number.

51742245 is a deficient number, since it is larger than the sum of its proper divisors (31045371).

51742245 is a wasteful number, since it uses less digits than its factorization.

51742245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3449491.

The product of its digits is 11200, while the sum is 30.

The square root of 51742245 is about 7193.2082550139. The cubic root of 51742245 is about 372.6333801589.

The spelling of 51742245 in words is "fifty-one million, seven hundred forty-two thousand, two hundred forty-five".