51112404 has 192 divisors, whose sum is σ = 165957120. Its totient is φ = 13271040.

The previous prime is 51112393. The next prime is 51112427. The reversal of 51112404 is 40421115.

It is a super-2 number, since 2×51112404² = 5224955685318432, which contains 22 as substring.

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 63 ways as a sum of consecutive naturals, for example, 526884 + ... + 526980.

It is an arithmetic number, because the mean of its divisors is an integer number (864360).

Almost surely, 2^51112404 is an apocalyptic number.

51112404 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 51112404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82978560).

51112404 is an abundant number, since it is smaller than the sum of its proper divisors (114844716).

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

51112404 is a wasteful number, since it uses less digits than its factorization.

51112404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 167 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 51112404 is about 7149.2939511535. The cubic root of 51112404 is about 371.1152229881.

Adding to 51112404 its reverse (40421115), we get a palindrome (91533519).

The spelling of 51112404 in words is "fifty-one million, one hundred twelve thousand, four hundred four".