161223480 has 256 divisors, whose sum is σ = 602380800. Its totient is φ = 38016000.

The previous prime is 161223479. The next prime is 161223481. The reversal of 161223480 is 84322161.

161223480 is a `hidden beast` number, since 1 + 612 + 2 + 3 + 48 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (161223479) and next prime (161223481).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161223481) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 486915 + ... + 487245.

It is an arithmetic number, because the mean of its divisors is an integer number (2353050).

Almost surely, 2^161223480 is an apocalyptic number.

161223480 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161223480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (301190400).

161223480 is an abundant number, since it is smaller than the sum of its proper divisors (441157320).

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

161223480 is a wasteful number, since it uses less digits than its factorization.

161223480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 161223480 is about 12697.3808322819. The cubic root of 161223480 is about 544.2637759862.

The spelling of 161223480 in words is "one hundred sixty-one million, two hundred twenty-three thousand, four hundred eighty".