51072646 has 8 divisors (see below), whose sum is σ = 80641080. Its totient is φ = 24192288.

The previous prime is 51072613. The next prime is 51072649. The reversal of 51072646 is 64627015.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51072649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671971 + ... + 672046.

It is an arithmetic number, because the mean of its divisors is an integer number (10080135).

Almost surely, 2^51072646 is an apocalyptic number.

51072646 is a deficient number, since it is larger than the sum of its proper divisors (29568434).

51072646 is a wasteful number, since it uses less digits than its factorization.

51072646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1344038.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 51072646 is about 7146.5128559319. The cubic root of 51072646 is about 371.0189735116.

The spelling of 51072646 in words is "fifty-one million, seventy-two thousand, six hundred forty-six".