51042042 has 32 divisors (see below), whose sum is σ = 115032960. Its totient is φ = 16773120.

The previous prime is 51041957. The next prime is 51042053. The reversal of 51042042 is 24024015.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2823 + ... + 10490.

It is an arithmetic number, because the mean of its divisors is an integer number (3594780).

Almost surely, 2^51042042 is an apocalyptic number.

51042042 is an abundant number, since it is smaller than the sum of its proper divisors (63990918).

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

51042042 is a wasteful number, since it uses less digits than its factorization.

51042042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13395 (or 13389 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 51042042 is about 7144.3713509307. The cubic root of 51042042 is about 370.9448507713.

Adding to 51042042 its reverse (24024015), we get a palindrome (75066057).

The spelling of 51042042 in words is "fifty-one million, forty-two thousand, forty-two".