55292250 has 128 divisors (see below), whose sum is σ = 152845056. Its totient is φ = 13228800.

The previous prime is 55292243. The next prime is 55292267. The reversal of 55292250 is 5229255.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 516697 + ... + 516803.

It is an arithmetic number, because the mean of its divisors is an integer number (1194102).

Almost surely, 2^55292250 is an apocalyptic number.

55292250 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

55292250 is the 3975-th nonagonal number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55292250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76422528).

55292250 is an abundant number, since it is smaller than the sum of its proper divisors (97552806).

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

55292250 is a wasteful number, since it uses less digits than its factorization.

55292250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193 (or 183 counting only the distinct ones).

The product of its (nonzero) digits is 9000, while the sum is 30.

The square root of 55292250 is about 7435.8758730899. The cubic root of 55292250 is about 380.9676400758.

The spelling of 55292250 in words is "fifty-five million, two hundred ninety-two thousand, two hundred fifty".