159551020 has 12 divisors (see below), whose sum is σ = 335057184. Its totient is φ = 63820400.

The previous prime is 159551009. The next prime is 159551033. The reversal of 159551020 is 20155951.

It is a self number, because there is not a number n which added to its sum of digits gives 159551020.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3988756 + ... + 3988795.

It is an arithmetic number, because the mean of its divisors is an integer number (27921432).

Almost surely, 2^159551020 is an apocalyptic number.

159551020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

159551020 is an abundant number, since it is smaller than the sum of its proper divisors (175506164).

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

159551020 is a wasteful number, since it uses less digits than its factorization.

159551020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7977560 (or 7977558 counting only the distinct ones).

The product of its (nonzero) digits is 2250, while the sum is 28.

The square root of 159551020 is about 12631.3506799550. The cubic root of 159551020 is about 542.3752479184.

The spelling of 159551020 in words is "one hundred fifty-nine million, five hundred fifty-one thousand, twenty".