51346645 has 16 divisors (see below), whose sum is σ = 74125440. Its totient is φ = 33355584.

The previous prime is 51346643. The next prime is 51346657. The reversal of 51346645 is 54664315.

It is a cyclic number.

It is not a de Polignac number, because 51346645 - 2¹ = 51346643 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51346645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51346643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37942 + ... + 39271.

It is an arithmetic number, because the mean of its divisors is an integer number (4632840).

Almost surely, 2^51346645 is an apocalyptic number.

It is an amenable number.

51346645 is a deficient number, since it is larger than the sum of its proper divisors (22778795).

51346645 is a wasteful number, since it uses less digits than its factorization.

51346645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77244.

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

The square root of 51346645 is about 7165.6573320247. The cubic root of 51346645 is about 371.6812822001.

The spelling of 51346645 in words is "fifty-one million, three hundred forty-six thousand, six hundred forty-five".