51619660 has 24 divisors (see below), whose sum is σ = 108976896. Its totient is φ = 20538240.

The previous prime is 51619657. The next prime is 51619661. The reversal of 51619660 is 6691615.

51619660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (51619661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2937 + ... + 10576.

It is an arithmetic number, because the mean of its divisors is an integer number (4540704).

Almost surely, 2^51619660 is an apocalyptic number.

It is an amenable number.

51619660 is an abundant number, since it is smaller than the sum of its proper divisors (57357236).

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

51619660 is a wasteful number, since it uses less digits than its factorization.

51619660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13713 (or 13711 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 51619660 is about 7184.6823172636. The cubic root of 51619660 is about 372.3388730039.

It can be divided in two parts, 5 and 1619660, that multiplied together give a triangular number (8098300 = T₄₀₂₄).

The spelling of 51619660 in words is "fifty-one million, six hundred nineteen thousand, six hundred sixty".