51123474 has 80 divisors (see below), whose sum is σ = 120748320. Its totient is φ = 16148160.

The previous prime is 51123463. The next prime is 51123487. The reversal of 51123474 is 47432115.

It is a super-2 number, since 2×51123474² = 5227219187657352, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 285517 + ... + 285695.

It is an arithmetic number, because the mean of its divisors is an integer number (1509354).

Almost surely, 2^51123474 is an apocalyptic number.

51123474 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 51123474, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60374160).

51123474 is an abundant number, since it is smaller than the sum of its proper divisors (69624846).

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

51123474 is a wasteful number, since it uses less digits than its factorization.

51123474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 277 (or 268 counting only the distinct ones).

The product of its digits is 3360, while the sum is 27.

The square root of 51123474 is about 7150.0681115637. The cubic root of 51123474 is about 371.1420132819.

Adding to 51123474 its reverse (47432115), we get a palindrome (98555589).

The spelling of 51123474 in words is "fifty-one million, one hundred twenty-three thousand, four hundred seventy-four".