51102542 has 4 divisors (see below), whose sum is σ = 76653816. Its totient is φ = 25551270.

The previous prime is 51102529. The next prime is 51102551. The reversal of 51102542 is 24520115.

51102542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24520115 = 5 ⋅4904023.

It is a super-2 number, since 2×51102542² = 5222939597723528, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 12775634 + ... + 12775637.

It is an arithmetic number, because the mean of its divisors is an integer number (19163454).

Almost surely, 2^51102542 is an apocalyptic number.

51102542 is a deficient number, since it is larger than the sum of its proper divisors (25551274).

51102542 is a wasteful number, since it uses less digits than its factorization.

51102542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25551273.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 51102542 is about 7148.6041994224. The cubic root of 51102542 is about 371.0913528935.

Adding to 51102542 its reverse (24520115), we get a palindrome (75622657).

The spelling of 51102542 in words is "fifty-one million, one hundred two thousand, five hundred forty-two".