51344520111 has 8 divisors (see below), whose sum is σ = 76065955760. Its totient is φ = 34229680056.

The previous prime is 51344520109. The next prime is 51344520151. The reversal of 51344520111 is 11102544315.

51344520111 is a `hidden beast` number, since 5 + 1 + 3 + 445 + 201 + 11 = 666.

It is not a de Polignac number, because 51344520111 - 2¹ = 51344520109 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1901648893 = 51344520111 / (5 + 1 + 3 + 4 + 4 + 5 + 2 + 0 + 1 + 1 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51344520151) 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, 950824420 + ... + 950824473.

It is an arithmetic number, because the mean of its divisors is an integer number (9508244470).

Almost surely, 2^51344520111 is an apocalyptic number.

51344520111 is a deficient number, since it is larger than the sum of its proper divisors (24721435649).

51344520111 is a wasteful number, since it uses less digits than its factorization.

51344520111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1901648902 (or 1901648896 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The spelling of 51344520111 in words is "fifty-one billion, three hundred forty-four million, five hundred twenty thousand, one hundred eleven".