51398447 has 8 divisors (see below), whose sum is σ = 52550400. Its totient is φ = 50257944.

The previous prime is 51398441. The next prime is 51398453. The reversal of 51398447 is 74489315.

It is an interprime number because it is at equal distance from previous prime (51398441) and next prime (51398453).

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 51398447 - 2⁶ = 51398383 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 (51398441) 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, 6554 + ... + 12072.

It is an arithmetic number, because the mean of its divisors is an integer number (6568800).

Almost surely, 2^51398447 is an apocalyptic number.

51398447 is a deficient number, since it is larger than the sum of its proper divisors (1151953).

51398447 is a wasteful number, since it uses less digits than its factorization.

51398447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5725.

The product of its digits is 120960, while the sum is 41.

The square root of 51398447 is about 7169.2710229144. The cubic root of 51398447 is about 371.8062326719.

The spelling of 51398447 in words is "fifty-one million, three hundred ninety-eight thousand, four hundred forty-seven".