51105054 has 128 divisors (see below), whose sum is σ = 140378112. Its totient is φ = 11975040.

The previous prime is 51105053. The next prime is 51105059. The reversal of 51105054 is 45050115.

It is a super-2 number, since 2×51105054² = 5223453088685832, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 51105054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51105053) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 402339 + ... + 402465.

It is an arithmetic number, because the mean of its divisors is an integer number (1096704).

Almost surely, 2^51105054 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51105054, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70189056).

51105054 is an abundant number, since it is smaller than the sum of its proper divisors (89273058).

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

51105054 is a wasteful number, since it uses less digits than its factorization.

51105054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230.

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 51105054 is about 7148.7798958983. The cubic root of 51105054 is about 371.0974332578.

Adding to 51105054 its reverse (45050115), we get a palindrome (96155169).

The spelling of 51105054 in words is "fifty-one million, one hundred five thousand, fifty-four".