51345646 has 8 divisors (see below), whose sum is σ = 84020184. Its totient is φ = 23338920.

The previous prime is 51345643. The next prime is 51345691. The reversal of 51345646 is 64654315.

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 (51345643) 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, 1166925 + ... + 1166968.

It is an arithmetic number, because the mean of its divisors is an integer number (10502523).

Almost surely, 2^51345646 is an apocalyptic number.

51345646 is a deficient number, since it is larger than the sum of its proper divisors (32674538).

51345646 is a wasteful number, since it uses less digits than its factorization.

51345646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2333906.

The product of its digits is 43200, while the sum is 34.

The square root of 51345646 is about 7165.5876241938. The cubic root of 51345646 is about 371.6788717083.

The spelling of 51345646 in words is "fifty-one million, three hundred forty-five thousand, six hundred forty-six".