51205542 has 16 divisors (see below), whose sum is σ = 103194432. Its totient is φ = 16937960.

The previous prime is 51205541. The next prime is 51205543. The reversal of 51205542 is 24550215.

It is a happy number.

51205542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (51205541) and next prime (51205543).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51205541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31788 + ... + 33359.

It is an arithmetic number, because the mean of its divisors is an integer number (6449652).

Almost surely, 2^51205542 is an apocalyptic number.

51205542 is an abundant number, since it is smaller than the sum of its proper divisors (51988890).

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

51205542 is a wasteful number, since it uses less digits than its factorization.

51205542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65283.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 51205542 is about 7155.8047765433. The cubic root of 51205542 is about 371.3405039584.

Adding to 51205542 its reverse (24550215), we get a palindrome (75755757).

The spelling of 51205542 in words is "fifty-one million, two hundred five thousand, five hundred forty-two".