51466399 has 8 divisors (see below), whose sum is σ = 52778880. Its totient is φ = 50159256.

The previous prime is 51466397. The next prime is 51466403. The reversal of 51466399 is 99366415.

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 51466399 - 2¹ = 51466397 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51466397) 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, 24222 + ... + 26260.

It is an arithmetic number, because the mean of its divisors is an integer number (6597360).

Almost surely, 2^51466399 is an apocalyptic number.

51466399 is a deficient number, since it is larger than the sum of its proper divisors (1312481).

51466399 is a wasteful number, since it uses less digits than its factorization.

51466399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669.

The product of its digits is 174960, while the sum is 43.

The square root of 51466399 is about 7174.0085726182. The cubic root of 51466399 is about 371.9700109752.

The spelling of 51466399 in words is "fifty-one million, four hundred sixty-six thousand, three hundred ninety-nine".