161915430 has 16 divisors (see below), whose sum is σ = 388597104. Its totient is φ = 43177440.

The previous prime is 161915399. The next prime is 161915431. The reversal of 161915430 is 34519161.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 5397181 = 161915430 / (1 + 6 + 1 + 9 + 1 + 5 + 4 + 3 + 0).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161915431) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2698561 + ... + 2698620.

It is an arithmetic number, because the mean of its divisors is an integer number (24287319).

Almost surely, 2^161915430 is an apocalyptic number.

161915430 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161915430 is an abundant number, since it is smaller than the sum of its proper divisors (226681674).

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

161915430 is a wasteful number, since it uses less digits than its factorization.

161915430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5397191.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 161915430 is about 12724.5994043035. The cubic root of 161915430 is about 545.0413009129.

The spelling of 161915430 in words is "one hundred sixty-one million, nine hundred fifteen thousand, four hundred thirty".