51171366 has 32 divisors (see below), whose sum is σ = 107147520. Its totient is φ = 16261344.

The previous prime is 51171361. The next prime is 51171371. The reversal of 51171366 is 66317115.

It is an interprime number because it is at equal distance from previous prime (51171361) and next prime (51171371).

Its product of digits (3780) is a multiple of the sum of its prime divisors (1260).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51171361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 71820 + ... + 72528.

It is an arithmetic number, because the mean of its divisors is an integer number (3348360).

Almost surely, 2^51171366 is an apocalyptic number.

51171366 is an abundant number, since it is smaller than the sum of its proper divisors (55976154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51171366 is a wasteful number, since it uses less digits than its factorization.

51171366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1260.

The product of its digits is 3780, while the sum is 30.

The square root of 51171366 is about 7153.4163865946. The cubic root of 51171366 is about 371.2578712521.

The spelling of 51171366 in words is "fifty-one million, one hundred seventy-one thousand, three hundred sixty-six".