51478246 has 4 divisors (see below), whose sum is σ = 77217372. Its totient is φ = 25739122.

The previous prime is 51478241. The next prime is 51478253. The reversal of 51478246 is 64287415.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×51478246² = 5300019622473032, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51478241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12869560 + ... + 12869563.

It is an arithmetic number, because the mean of its divisors is an integer number (19304343).

Almost surely, 2^51478246 is an apocalyptic number.

51478246 is a deficient number, since it is larger than the sum of its proper divisors (25739126).

51478246 is a wasteful number, since it uses less digits than its factorization.

51478246 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25739125.

The product of its digits is 53760, while the sum is 37.

The square root of 51478246 is about 7174.8342141125. The cubic root of 51478246 is about 371.9985499230.

The spelling of 51478246 in words is "fifty-one million, four hundred seventy-eight thousand, two hundred forty-six".