51100542 has 12 divisors (see below), whose sum is σ = 110717880. Its totient is φ = 17033508.

The previous prime is 51100531. The next prime is 51100547. The reversal of 51100542 is 24500115.

It is a super-2 number, since 2×51100542² = 5222530785387528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 2838919 = 51100542 / (5 + 1 + 1 + 0 + 0 + 5 + 4 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51100547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1419442 + ... + 1419477.

It is an arithmetic number, because the mean of its divisors is an integer number (9226490).

Almost surely, 2^51100542 is an apocalyptic number.

51100542 is an abundant number, since it is smaller than the sum of its proper divisors (59617338).

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

51100542 is a wasteful number, since it uses less digits than its factorization.

51100542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2838927 (or 2838924 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 51100542 is about 7148.4643106055. The cubic root of 51100542 is about 371.0865116967.

Adding to 51100542 its reverse (24500115), we get a palindrome (75600657).

The spelling of 51100542 in words is "fifty-one million, one hundred thousand, five hundred forty-two".