161315130 has 32 divisors (see below), whose sum is σ = 407534400. Its totient is φ = 40753152.

The previous prime is 161315117. The next prime is 161315137. The reversal of 161315130 is 31513161.

It is a junction number, because it is equal to n+sod(n) for n = 161315097 and 161315106.

It is not an unprimeable number, because it can be changed into a prime (161315137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 140935 + ... + 142074.

It is an arithmetic number, because the mean of its divisors is an integer number (12735450).

Almost surely, 2^161315130 is an apocalyptic number.

161315130 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

161315130 is an abundant number, since it is smaller than the sum of its proper divisors (246219270).

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

161315130 is a wasteful number, since it uses less digits than its factorization.

161315130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283038.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 161315130 is about 12700.9893315442. The cubic root of 161315130 is about 544.3668881921.

Adding to 161315130 its reverse (31513161), we get a palindrome (192828291).

The spelling of 161315130 in words is "one hundred sixty-one million, three hundred fifteen thousand, one hundred thirty".