51912511 has 6 divisors (see below), whose sum is σ = 60388080. Its totient is φ = 44496396.

The previous prime is 51912499. The next prime is 51912527. The reversal of 51912511 is 11521915.

It is a happy number.

It is not a de Polignac number, because 51912511 - 2¹⁹ = 51388223 is a prime.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51912551) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 529671 + ... + 529768.

It is an arithmetic number, because the mean of its divisors is an integer number (10064680).

Almost surely, 2^51912511 is an apocalyptic number.

51912511 is a deficient number, since it is larger than the sum of its proper divisors (8475569).

51912511 is a wasteful number, since it uses less digits than its factorization.

51912511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059453 (or 1059446 counting only the distinct ones).

The product of its digits is 450, while the sum is 25.

The square root of 51912511 is about 7205.0337264998. The cubic root of 51912511 is about 373.0416688996.

The spelling of 51912511 in words is "fifty-one million, nine hundred twelve thousand, five hundred eleven".