51550011 has 12 divisors (see below), whose sum is σ = 75723960. Its totient is φ = 33783840.

The previous prime is 51550007. The next prime is 51550013. The reversal of 51550011 is 11005515.

It is not a de Polignac number, because 51550011 - 2² = 51550007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51550013) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48010 + ... + 49071.

It is an arithmetic number, because the mean of its divisors is an integer number (6310330).

Almost surely, 2^51550011 is an apocalyptic number.

51550011 is a deficient number, since it is larger than the sum of its proper divisors (24173949).

51550011 is a wasteful number, since it uses less digits than its factorization.

51550011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97146 (or 97143 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

The square root of 51550011 is about 7179.8336331701. The cubic root of 51550011 is about 372.1713353997.

Adding to 51550011 its reverse (11005515), we get a palindrome (62555526).

The spelling of 51550011 in words is "fifty-one million, five hundred fifty thousand, eleven".