101009550 has 24 divisors (see below), whose sum is σ = 250504056. Its totient is φ = 26935840.

The previous prime is 101009539. The next prime is 101009551. The reversal of 101009550 is 55900101.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (101009551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 336549 + ... + 336848.

It is an arithmetic number, because the mean of its divisors is an integer number (10437669).

Almost surely, 2^101009550 is an apocalyptic number.

101009550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

101009550 is an abundant number, since it is smaller than the sum of its proper divisors (149494506).

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

101009550 is a wasteful number, since it uses less digits than its factorization.

101009550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673412 (or 673407 counting only the distinct ones).

The product of its (nonzero) digits is 225, while the sum is 21.

The square root of 101009550 is about 10050.3507401483. The cubic root of 101009550 is about 465.7156283511.

Adding to 101009550 its reverse (55900101), we get a palindrome (156909651).

The spelling of 101009550 in words is "one hundred one million, nine thousand, five hundred fifty".