51400211 has 4 divisors (see below), whose sum is σ = 51492072. Its totient is φ = 51308352.

The previous prime is 51400177. The next prime is 51400229. The reversal of 51400211 is 11200415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11200415 = 5 ⋅2240083.

It is a cyclic number.

It is not a de Polignac number, because 51400211 - 2¹⁸ = 51138067 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51400241) 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, 45086 + ... + 46211.

It is an arithmetic number, because the mean of its divisors is an integer number (12873018).

Almost surely, 2^51400211 is an apocalyptic number.

51400211 is a deficient number, since it is larger than the sum of its proper divisors (91861).

51400211 is an equidigital number, since it uses as much as digits as its factorization.

51400211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91860.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 51400211 is about 7169.3940469192. The cubic root of 51400211 is about 371.8104860993.

Adding to 51400211 its reverse (11200415), we get a palindrome (62600626).

The spelling of 51400211 in words is "fifty-one million, four hundred thousand, two hundred eleven".