51423199 has 4 divisors (see below), whose sum is σ = 51525936. Its totient is φ = 51320464.

The previous prime is 51423179. The next prime is 51423209. The reversal of 51423199 is 99132415.

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

It is a cyclic number.

It is not a de Polignac number, because 51423199 - 2¹⁵ = 51390431 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 (51423109) 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, 50614 + ... + 51619.

It is an arithmetic number, because the mean of its divisors is an integer number (12881484).

Almost surely, 2^51423199 is an apocalyptic number.

51423199 is a deficient number, since it is larger than the sum of its proper divisors (102737).

51423199 is a wasteful number, since it uses less digits than its factorization.

51423199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102736.

The product of its digits is 9720, while the sum is 34.

The square root of 51423199 is about 7170.9970715375. The cubic root of 51423199 is about 371.8659067899.

It can be divided in two parts, 514 and 23199, that multiplied together give a triangular number (11924286 = T₄₈₈₃).

The spelling of 51423199 in words is "fifty-one million, four hundred twenty-three thousand, one hundred ninety-nine".