55111950 has 36 divisors (see below), whose sum is σ = 148068648. Its totient is φ = 14696400.

The previous prime is 55111897. The next prime is 55111957. The reversal of 55111950 is 5911155.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55111957) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 60786 + ... + 61685.

It is an arithmetic number, because the mean of its divisors is an integer number (4113018).

Almost surely, 2^55111950 is an apocalyptic number.

55111950 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55111950 is an abundant number, since it is smaller than the sum of its proper divisors (92956698).

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

55111950 is a wasteful number, since it uses less digits than its factorization.

55111950 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122489 (or 122481 counting only the distinct ones).

The product of its (nonzero) digits is 1125, while the sum is 27.

The square root of 55111950 is about 7423.7423177263. The cubic root of 55111950 is about 380.5530957705.

The spelling of 55111950 in words is "fifty-five million, one hundred eleven thousand, nine hundred fifty".