161351420 has 48 divisors (see below), whose sum is σ = 377667360. Its totient is φ = 57544704.

The previous prime is 161351387. The next prime is 161351431. The reversal of 161351420 is 24153161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6029 + ... + 18948.

It is an arithmetic number, because the mean of its divisors is an integer number (7868070).

Almost surely, 2^161351420 is an apocalyptic number.

161351420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161351420 is an abundant number, since it is smaller than the sum of its proper divisors (216315940).

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

161351420 is a wasteful number, since it uses less digits than its factorization.

161351420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25022 (or 25020 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 161351420 is about 12702.4178800731. The cubic root of 161351420 is about 544.4077060067.

The spelling of 161351420 in words is "one hundred sixty-one million, three hundred fifty-one thousand, four hundred twenty".