121552550 has 96 divisors (see below), whose sum is σ = 282839040. Its totient is φ = 37900800.

The previous prime is 121552507. The next prime is 121552553. The reversal of 121552550 is 55255121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121552553) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 184121 + ... + 184779.

It is an arithmetic number, because the mean of its divisors is an integer number (2946240).

Almost surely, 2^121552550 is an apocalyptic number.

121552550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121552550 is an abundant number, since it is smaller than the sum of its proper divisors (161286490).

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

121552550 is a wasteful number, since it uses less digits than its factorization.

121552550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 726 (or 721 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 121552550 is about 11025.0873012417. The cubic root of 121552550 is about 495.3604829174.

The spelling of 121552550 in words is "one hundred twenty-one million, five hundred fifty-two thousand, five hundred fifty".