51546649 has 8 divisors (see below), whose sum is σ = 64266048. Its totient is φ = 40166160.

The previous prime is 51546643. The next prime is 51546683. The reversal of 51546649 is 94664515.

It is a happy number.

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 51546649 - 2⁵ = 51546617 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51546643) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 334642 + ... + 334795.

It is an arithmetic number, because the mean of its divisors is an integer number (8033256).

Almost surely, 2^51546649 is an apocalyptic number.

It is an amenable number.

51546649 is a deficient number, since it is larger than the sum of its proper divisors (12719399).

51546649 is a wasteful number, since it uses less digits than its factorization.

51546649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 669455.

The product of its digits is 129600, while the sum is 40.

The square root of 51546649 is about 7179.5995013650. The cubic root of 51546649 is about 372.1632444397.

It can be divided in two parts, 515466 and 49, that added together give a palindrome (515515).

The spelling of 51546649 in words is "fifty-one million, five hundred forty-six thousand, six hundred forty-nine".