51026004 has 48 divisors (see below), whose sum is σ = 133103040. Its totient is φ = 16904160.

The previous prime is 51025999. The next prime is 51026033. The reversal of 51026004 is 40062015.

It is a happy number.

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, 17319 + ... + 20049.

It is an arithmetic number, because the mean of its divisors is an integer number (2772980).

Almost surely, 2^51026004 is an apocalyptic number.

51026004 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51026004, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (66551520).

51026004 is an abundant number, since it is smaller than the sum of its proper divisors (82077036).

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

51026004 is a wasteful number, since it uses less digits than its factorization.

51026004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2917 (or 2909 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 51026004 is about 7143.2488406887. The cubic root of 51026004 is about 370.9059949805.

Adding to 51026004 its reverse (40062015), we get a palindrome (91088019).

The spelling of 51026004 in words is "fifty-one million, twenty-six thousand, four".