51001447 has 8 divisors (see below), whose sum is σ = 58336416. Its totient is φ = 43678752.

The previous prime is 51001441. The next prime is 51001469. The reversal of 51001447 is 74410015.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51001447 is a prime.

It is a super-2 number, since 2×51001447² = 5202295192187618, 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 (51001441) 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, 9033 + ... + 13549.

It is an arithmetic number, because the mean of its divisors is an integer number (7292052).

Almost surely, 2^51001447 is an apocalyptic number.

51001447 is the 4517-th heptagonal number.

51001447 is a deficient number, since it is larger than the sum of its proper divisors (7334969).

51001447 is a wasteful number, since it uses less digits than its factorization.

51001447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6137.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 51001447 is about 7141.5297380883. The cubic root of 51001447 is about 370.8464841470.

The spelling of 51001447 in words is "fifty-one million, one thousand, four hundred forty-seven".