55031802 has 48 divisors (see below), whose sum is σ = 131519520. Its totient is φ = 15295392.

The previous prime is 55031777. The next prime is 55031803. The reversal of 55031802 is 20813055.

It is not an unprimeable number, because it can be changed into a prime (55031803) 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, 8349 + ... + 13407.

It is an arithmetic number, because the mean of its divisors is an integer number (2739990).

Almost surely, 2^55031802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55031802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65759760).

55031802 is an abundant number, since it is smaller than the sum of its proper divisors (76487718).

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

55031802 is a wasteful number, since it uses less digits than its factorization.

55031802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5115 (or 5108 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 24.

The square root of 55031802 is about 7418.3422676498. The cubic root of 55031802 is about 380.3685298285.

Adding to 55031802 its reverse (20813055), we get a palindrome (75844857).

The spelling of 55031802 in words is "fifty-five million, thirty-one thousand, eight hundred two".