51042030 has 64 divisors (see below), whose sum is σ = 136503360. Its totient is φ = 12128256.

The previous prime is 51041957. The next prime is 51042053. The reversal of 51042030 is 3024015.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9054 + ... + 13566.

It is an arithmetic number, because the mean of its divisors is an integer number (2132865).

Almost surely, 2^51042030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51042030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68251680).

51042030 is an abundant number, since it is smaller than the sum of its proper divisors (85461330).

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

51042030 is a wasteful number, since it uses less digits than its factorization.

51042030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4565.

The product of its (nonzero) digits is 120, while the sum is 15.

The square root of 51042030 is about 7144.3705111087. The cubic root of 51042030 is about 370.9448217016.

Adding to 51042030 its reverse (3024015), we get a palindrome (54066045).

The spelling of 51042030 in words is "fifty-one million, forty-two thousand, thirty".