51646061 has 4 divisors (see below), whose sum is σ = 51963072. Its totient is φ = 51329052.

The previous prime is 51646057. The next prime is 51646069. The reversal of 51646061 is 16064615.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51646061 - 2² = 51646057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51646069) 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, 158261 + ... + 158586.

It is an arithmetic number, because the mean of its divisors is an integer number (12990768).

Almost surely, 2^51646061 is an apocalyptic number.

It is an amenable number.

51646061 is a deficient number, since it is larger than the sum of its proper divisors (317011).

51646061 is a wasteful number, since it uses less digits than its factorization.

51646061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317010.

The product of its (nonzero) digits is 4320, while the sum is 29.

The square root of 51646061 is about 7186.5193939765. The cubic root of 51646061 is about 372.4023400575.

The spelling of 51646061 in words is "fifty-one million, six hundred forty-six thousand, sixty-one".