51951611 has 4 divisors (see below), whose sum is σ = 53159832. Its totient is φ = 50743392.

The previous prime is 51951593. The next prime is 51951619. The reversal of 51951611 is 11615915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51951611 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51951619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 604046 + ... + 604131.

It is an arithmetic number, because the mean of its divisors is an integer number (13289958).

Almost surely, 2^51951611 is an apocalyptic number.

51951611 is a deficient number, since it is larger than the sum of its proper divisors (1208221).

51951611 is a wasteful number, since it uses less digits than its factorization.

51951611 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208220.

The product of its digits is 1350, while the sum is 29.

The square root of 51951611 is about 7207.7465965446. The cubic root of 51951611 is about 373.1353025184.

The spelling of 51951611 in words is "fifty-one million, nine hundred fifty-one thousand, six hundred eleven".