122643550 has 48 divisors (see below), whose sum is σ = 235252800. Its totient is φ = 47548800.

The previous prime is 122643527. The next prime is 122643553. The reversal of 122643550 is 55346221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122643553) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 240696 + ... + 241204.

It is an arithmetic number, because the mean of its divisors is an integer number (4901100).

Almost surely, 2^122643550 is an apocalyptic number.

122643550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

122643550 is a deficient number, since it is larger than the sum of its proper divisors (112609250).

122643550 is a wasteful number, since it uses less digits than its factorization.

122643550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 661 (or 656 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 122643550 is about 11074.4548398555. The cubic root of 122643550 is about 496.8381137656.

Adding to 122643550 its reverse (55346221), we get a palindrome (177989771).

The spelling of 122643550 in words is "one hundred twenty-two million, six hundred forty-three thousand, five hundred fifty".