161002550 has 12 divisors (see below), whose sum is σ = 299464836. Its totient is φ = 64401000.

The previous prime is 161002547. The next prime is 161002601. The reversal of 161002550 is 55200161.

It is a super-2 number, since 2×161002550² = 51843642213005000, which contains 22 as substring.

It is a hoax number, since the sum of its digits (20) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1609976 + ... + 1610075.

It is an arithmetic number, because the mean of its divisors is an integer number (24955403).

Almost surely, 2^161002550 is an apocalyptic number.

161002550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161002550 is a deficient number, since it is larger than the sum of its proper divisors (138462286).

161002550 is a wasteful number, since it uses less digits than its factorization.

161002550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220063 (or 3220058 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 161002550 is about 12688.6780241284. The cubic root of 161002550 is about 544.0150546403.

The spelling of 161002550 in words is "one hundred sixty-one million, two thousand, five hundred fifty".