51256611 has 32 divisors (see below), whose sum is σ = 87659520. Its totient is φ = 28994112.

The previous prime is 51256589. The next prime is 51256637. The reversal of 51256611 is 11665215.

It is a happy number.

It is not a de Polignac number, because 51256611 - 2⁷ = 51256483 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (51256651) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 18151 + ... + 20783.

It is an arithmetic number, because the mean of its divisors is an integer number (2739360).

Almost surely, 2^51256611 is an apocalyptic number.

51256611 is a deficient number, since it is larger than the sum of its proper divisors (36402909).

51256611 is a wasteful number, since it uses less digits than its factorization.

51256611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2752 (or 2746 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 51256611 is about 7159.3722490174. The cubic root of 51256611 is about 371.4639130432.

The spelling of 51256611 in words is "fifty-one million, two hundred fifty-six thousand, six hundred eleven".