100161225520 has 40 divisors (see below), whose sum is σ = 238554731520. Its totient is φ = 39087306240.

The previous prime is 100161225449. The next prime is 100161225547. The reversal of 100161225520 is 25522161001.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15265200 + ... + 15271759.

It is an arithmetic number, because the mean of its divisors is an integer number (5963868288).

Almost surely, 2^100161225520 is an apocalyptic number.

100161225520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

100161225520 is an abundant number, since it is smaller than the sum of its proper divisors (138393506000).

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

100161225520 is a wasteful number, since it uses less digits than its factorization.

100161225520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30537013 (or 30537007 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 100161225520 its reverse (25522161001), we get a palindrome (125683386521).

The spelling of 100161225520 in words is "one hundred billion, one hundred sixty-one million, two hundred twenty-five thousand, five hundred twenty".