51113040 has 160 divisors (see below), whose sum is σ = 182131200. Its totient is φ = 11727360.

The previous prime is 51113011. The next prime is 51113053. The reversal of 51113040 is 4031115.

It is a super-2 number, since 2×51113040² = 5225085716083200, which contains 22 as substring.

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, 49651 + ... + 50669.

It is an arithmetic number, because the mean of its divisors is an integer number (1138320).

Almost surely, 2^51113040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51113040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (91065600).

51113040 is an abundant number, since it is smaller than the sum of its proper divisors (131018160).

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

51113040 is a wasteful number, since it uses less digits than its factorization.

51113040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065 (or 1059 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 51113040 is about 7149.3384309319. The cubic root of 51113040 is about 371.1167622642.

Adding to 51113040 its reverse (4031115), we get a palindrome (55144155).

The spelling of 51113040 in words is "fifty-one million, one hundred thirteen thousand, forty".