51662047 has 4 divisors (see below), whose sum is σ = 51929920. Its totient is φ = 51394176.

The previous prime is 51662029. The next prime is 51662057. The reversal of 51662047 is 74026615.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51662047 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 (51662057) 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, 133647 + ... + 134032.

It is an arithmetic number, because the mean of its divisors is an integer number (12982480).

Almost surely, 2^51662047 is an apocalyptic number.

51662047 is a deficient number, since it is larger than the sum of its proper divisors (267873).

51662047 is a wasteful number, since it uses less digits than its factorization.

51662047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 267872.

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

The square root of 51662047 is about 7187.6315292313. The cubic root of 51662047 is about 372.4407593133.

The spelling of 51662047 in words is "fifty-one million, six hundred sixty-two thousand, forty-seven".