51156522 has 40 divisors (see below), whose sum is σ = 118592100. Its totient is φ = 16462656.

The previous prime is 51156517. The next prime is 51156527. The reversal of 51156522 is 22565115.

51156522 is a `hidden beast` number, since 5 + 1 + 1 + 5 + 652 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (51156517) and next prime (51156527).

It can be written as a sum of positive squares in 2 ways, for example, as 46908801 + 4247721 = 6849^2 + 2061^2 .

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 (51156527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 747 + ... + 10142.

Almost surely, 2^51156522 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51156522, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (59296050).

51156522 is an abundant number, since it is smaller than the sum of its proper divisors (67435578).

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

51156522 is a wasteful number, since it uses less digits than its factorization.

51156522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10932 (or 10923 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 51156522 is about 7152.3787651382. The cubic root of 51156522 is about 371.2219691110.

The spelling of 51156522 in words is "fifty-one million, one hundred fifty-six thousand, five hundred twenty-two".