55121150 has 24 divisors (see below), whose sum is σ = 117172560. Its totient is φ = 18898560.

The previous prime is 55121149. The next prime is 55121153. The reversal of 55121150 is 5112155.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55121153) 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, 78395 + ... + 79094.

It is an arithmetic number, because the mean of its divisors is an integer number (4882190).

Almost surely, 2^55121150 is an apocalyptic number.

55121150 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55121150 is an abundant number, since it is smaller than the sum of its proper divisors (62051410).

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

55121150 is a wasteful number, since it uses less digits than its factorization.

55121150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157508 (or 157503 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 20.

The square root of 55121150 is about 7424.3619254452. The cubic root of 55121150 is about 380.5742702084.

The spelling of 55121150 in words is "fifty-five million, one hundred twenty-one thousand, one hundred fifty".