51163542 has 64 divisors (see below), whose sum is σ = 122342400. Its totient is φ = 15798240.

The previous prime is 51163517. The next prime is 51163549. The reversal of 51163542 is 24536115.

51163542 is a `hidden beast` number, since 5 + 116 + 3 + 542 = 666.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51163549) 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, 47692 + ... + 48752.

It is an arithmetic number, because the mean of its divisors is an integer number (1911600).

Almost surely, 2^51163542 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51163542, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (61171200).

51163542 is an abundant number, since it is smaller than the sum of its proper divisors (71178858).

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

51163542 is a wasteful number, since it uses less digits than its factorization.

51163542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1138 (or 1132 counting only the distinct ones).

The product of its digits is 3600, while the sum is 27.

The square root of 51163542 is about 7152.8694941261. The cubic root of 51163542 is about 371.2389487579.

Adding to 51163542 its reverse (24536115), we get a palindrome (75699657).

The spelling of 51163542 in words is "fifty-one million, one hundred sixty-three thousand, five hundred forty-two".