101551532220 has 288 divisors, whose sum is σ = 329356355328. Its totient is φ = 26250158592.

The previous prime is 101551532183. The next prime is 101551532239. The reversal of 101551532220 is 22235155101.

101551532220 is a `hidden beast` number, since 101 + 5 + 5 + 1 + 532 + 2 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 28628487 + ... + 28632033.

It is an arithmetic number, because the mean of its divisors is an integer number (1143598456).

Almost surely, 2^101551532220 is an apocalyptic number.

101551532220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 101551532220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164678177664).

101551532220 is an abundant number, since it is smaller than the sum of its proper divisors (227804823108).

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

101551532220 is a wasteful number, since it uses less digits than its factorization.

101551532220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3751 (or 3737 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

Adding to 101551532220 its reverse (22235155101), we get a palindrome (123786687321).

The spelling of 101551532220 in words is "one hundred one billion, five hundred fifty-one million, five hundred thirty-two thousand, two hundred twenty".