51881456 has 20 divisors (see below), whose sum is σ = 109658904. Its totient is φ = 23582400.

The previous prime is 51881443. The next prime is 51881471. The reversal of 51881456 is 65418815.

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, 147215 + ... + 147566.

Almost surely, 2^51881456 is an apocalyptic number.

It is an amenable number.

51881456 is an abundant number, since it is smaller than the sum of its proper divisors (57777448).

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

51881456 is a wasteful number, since it uses less digits than its factorization.

51881456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294800 (or 294794 counting only the distinct ones).

The product of its digits is 38400, while the sum is 38.

The square root of 51881456 is about 7202.8783135633. The cubic root of 51881456 is about 372.9672673109.

The spelling of 51881456 in words is "fifty-one million, eight hundred eighty-one thousand, four hundred fifty-six".