51089047 has 4 divisors (see below), whose sum is σ = 52176096. Its totient is φ = 50002000.

The previous prime is 51089021. The next prime is 51089053. The reversal of 51089047 is 74098015.

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-51089047 is a prime.

It is a super-2 number, since 2×51089047² = 5220181446736418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51080047) 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, 543454 + ... + 543547.

It is an arithmetic number, because the mean of its divisors is an integer number (13044024).

Almost surely, 2^51089047 is an apocalyptic number.

51089047 is a deficient number, since it is larger than the sum of its proper divisors (1087049).

51089047 is a wasteful number, since it uses less digits than its factorization.

51089047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087048.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 51089047 is about 7147.6602465422. The cubic root of 51089047 is about 371.0586844685.

The spelling of 51089047 in words is "fifty-one million, eighty-nine thousand, forty-seven".