51091132 has 12 divisors (see below), whose sum is σ = 89545176. Its totient is φ = 25506800.

The previous prime is 51091129. The next prime is 51091141. The reversal of 51091132 is 23119015.

It is a super-2 number, since 2×51091132² = 5220607538082848, 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, 6619 + ... + 12082.

It is an arithmetic number, because the mean of its divisors is an integer number (7462098).

Almost surely, 2^51091132 is an apocalyptic number.

It is an amenable number.

51091132 is a deficient number, since it is larger than the sum of its proper divisors (38454044).

51091132 is a wasteful number, since it uses less digits than its factorization.

51091132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19388 (or 19386 counting only the distinct ones).

The product of its (nonzero) digits is 270, while the sum is 22.

The square root of 51091132 is about 7147.8060969783. The cubic root of 51091132 is about 371.0637321703.

It can be divided in two parts, 5109 and 1132, that added together give a square (6241 = 79²).

The spelling of 51091132 in words is "fifty-one million, ninety-one thousand, one hundred thirty-two".