121632550 has 24 divisors (see below), whose sum is σ = 243640656. Its totient is φ = 44910240.

The previous prime is 121632521. The next prime is 121632557. The reversal of 121632550 is 55236121.

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 (121632557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92914 + ... + 94213.

It is an arithmetic number, because the mean of its divisors is an integer number (10151694).

Almost surely, 2^121632550 is an apocalyptic number.

121632550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121632550 is an abundant number, since it is smaller than the sum of its proper divisors (122008106).

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

121632550 is a wasteful number, since it uses less digits than its factorization.

121632550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187152 (or 187147 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 121632550 is about 11028.7147936648. The cubic root of 121632550 is about 495.4691331757.

Adding to 121632550 its reverse (55236121), we get a palindrome (176868671).

The spelling of 121632550 in words is "one hundred twenty-one million, six hundred thirty-two thousand, five hundred fifty".