51102042 has 16 divisors (see below), whose sum is σ = 102348192. Its totient is φ = 17010000.

The previous prime is 51101989. The next prime is 51102049. The reversal of 51102042 is 24020115.

It is a super-2 number, since 2×51102042² = 5222837393139528, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51102049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1084 + ... + 10167.

It is an arithmetic number, because the mean of its divisors is an integer number (6396762).

Almost surely, 2^51102042 is an apocalyptic number.

51102042 is an abundant number, since it is smaller than the sum of its proper divisors (51246150).

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

51102042 is a wasteful number, since it uses less digits than its factorization.

51102042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12013.

The product of its (nonzero) digits is 80, while the sum is 15.

The square root of 51102042 is about 7148.5692274748. The cubic root of 51102042 is about 371.0901426062.

Adding to 51102042 its reverse (24020115), we get a palindrome (75122157).

The spelling of 51102042 in words is "fifty-one million, one hundred two thousand, forty-two".