161415700 has 18 divisors (see below), whose sum is σ = 350272286. Its totient is φ = 64566240.

The previous prime is 161415691. The next prime is 161415701. The reversal of 161415700 is 7514161.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 2353156 + 159062544 = 1534^2 + 12612^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161415701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 806979 + ... + 807178.

Almost surely, 2^161415700 is an apocalyptic number.

161415700 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161415700 is an abundant number, since it is smaller than the sum of its proper divisors (188856586).

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

161415700 is a wasteful number, since it uses less digits than its factorization.

161415700 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614171 (or 1614164 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 25.

The square root of 161415700 is about 12704.9478550681. The cubic root of 161415700 is about 544.4799910461.

Adding to 161415700 its reverse (7514161), we get a palindrome (168929861).

The spelling of 161415700 in words is "one hundred sixty-one million, four hundred fifteen thousand, seven hundred".