51401111 has 8 divisors (see below), whose sum is σ = 51937680. Its totient is φ = 50867712.

The previous prime is 51401093. The next prime is 51401123. The reversal of 51401111 is 11110415.

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-51401111 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 (51401171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 43616 + ... + 44778.

It is an arithmetic number, because the mean of its divisors is an integer number (6492210).

Almost surely, 2^51401111 is an apocalyptic number.

51401111 is a deficient number, since it is larger than the sum of its proper divisors (536569).

51401111 is a wasteful number, since it uses less digits than its factorization.

51401111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1585.

The product of its (nonzero) digits is 20, while the sum is 14.

The square root of 51401111 is about 7169.4568134553. The cubic root of 51401111 is about 371.8126561778.

Adding to 51401111 its reverse (11110415), we get a palindrome (62511526).

The spelling of 51401111 in words is "fifty-one million, four hundred one thousand, one hundred eleven".