55251330 has 16 divisors (see below), whose sum is σ = 132603264. Its totient is φ = 14733680.

The previous prime is 55251307. The next prime is 55251347. The reversal of 55251330 is 3315255.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 55251330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 920826 + ... + 920885.

It is an arithmetic number, because the mean of its divisors is an integer number (8287704).

Almost surely, 2^55251330 is an apocalyptic number.

55251330 is an abundant number, since it is smaller than the sum of its proper divisors (77351934).

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

55251330 is a wasteful number, since it uses less digits than its factorization.

55251330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841721.

The product of its (nonzero) digits is 2250, while the sum is 24.

The square root of 55251330 is about 7433.1238386024. The cubic root of 55251330 is about 380.8736362862.

Adding to 55251330 its reverse (3315255), we get a palindrome (58566585).

The spelling of 55251330 in words is "fifty-five million, two hundred fifty-one thousand, three hundred thirty".