51106388 has 12 divisors (see below), whose sum is σ = 89828340. Its totient is φ = 25441152.

The previous prime is 51106379. The next prime is 51106411. The reversal of 51106388 is 88360115.

It can be written as a sum of positive squares in 2 ways, for example, as 25684624 + 25421764 = 5068^2 + 5042^2 .

It is a super-2 number, since 2×51106388² = 5223725788813088, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26981 + ... + 28812.

It is an arithmetic number, because the mean of its divisors is an integer number (7485695).

Almost surely, 2^51106388 is an apocalyptic number.

It is an amenable number.

51106388 is a deficient number, since it is larger than the sum of its proper divisors (38721952).

51106388 is a wasteful number, since it uses less digits than its factorization.

51106388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56026 (or 56024 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 51106388 is about 7148.8731979243. The cubic root of 51106388 is about 371.1006621600.

The spelling of 51106388 in words is "fifty-one million, one hundred six thousand, three hundred eighty-eight".