51881332 has 6 divisors (see below), whose sum is σ = 90792338. Its totient is φ = 25940664.

The previous prime is 51881327. The next prime is 51881339. The reversal of 51881332 is 23318815.

It can be written as a sum of positive squares in only one way, i.e., 30758116 + 21123216 = 5546^2 + 4596^2 .

It is a super-2 number, since 2×51881332² = 5383345220188448, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 51881294 and 51881303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51881339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6485163 + ... + 6485170.

Almost surely, 2^51881332 is an apocalyptic number.

It is an amenable number.

51881332 is a deficient number, since it is larger than the sum of its proper divisors (38911006).

51881332 is a wasteful number, since it uses less digits than its factorization.

51881332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12970337 (or 12970335 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 51881332 is about 7202.8697058881. The cubic root of 51881332 is about 372.9669701721.

The spelling of 51881332 in words is "fifty-one million, eight hundred eighty-one thousand, three hundred thirty-two".