51783480 has 96 divisors (see below), whose sum is σ = 192348000. Its totient is φ = 11835648.

The previous prime is 51783463. The next prime is 51783497. The reversal of 51783480 is 8438715.

51783480 is a `hidden beast` number, since 5 + 178 + 3 + 480 = 666.

It is an interprime number because it is at equal distance from previous prime (51783463) and next prime (51783497).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7755 + ... + 12794.

It is an arithmetic number, because the mean of its divisors is an integer number (2003625).

Almost surely, 2^51783480 is an apocalyptic number.

It is an amenable number.

51783480 is an abundant number, since it is smaller than the sum of its proper divisors (140564520).

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

51783480 is a wasteful number, since it uses less digits than its factorization.

51783480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20573 (or 20566 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 36.

The square root of 51783480 is about 7196.0739295813. The cubic root of 51783480 is about 372.7323415747.

The spelling of 51783480 in words is "fifty-one million, seven hundred eighty-three thousand, four hundred eighty".