55251340 has 12 divisors (see below), whose sum is σ = 116027856. Its totient is φ = 22100528.

The previous prime is 55251307. The next prime is 55251347. The reversal of 55251340 is 4315255.

It is not an unprimeable number, because it can be changed into a prime (55251347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1381264 + ... + 1381303.

It is an arithmetic number, because the mean of its divisors is an integer number (9668988).

Almost surely, 2^55251340 is an apocalyptic number.

It is an amenable number.

55251340 is an abundant number, since it is smaller than the sum of its proper divisors (60776516).

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

55251340 is a wasteful number, since it uses less digits than its factorization.

55251340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2762576 (or 2762574 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 55251340 is about 7433.1245112671. The cubic root of 55251340 is about 380.8736592645.

Adding to 55251340 its reverse (4315255), we get a palindrome (59566595).

The spelling of 55251340 in words is "fifty-five million, two hundred fifty-one thousand, three hundred forty".