55371240 has 96 divisors (see below), whose sum is σ = 184864680. Its totient is φ = 14363136.

The previous prime is 55371233. The next prime is 55371241. The reversal of 55371240 is 4217355.

It is a happy number.

55371240 is a `hidden beast` number, since 5 + 537 + 124 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 51753636 + 3617604 = 7194^2 + 1902^2 .

It is not an unprimeable number, because it can be changed into a prime (55371241) 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, 11242 + ... + 15398.

Almost surely, 2^55371240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 55371240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92432340).

55371240 is an abundant number, since it is smaller than the sum of its proper divisors (129493440).

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

55371240 is a wasteful number, since it uses less digits than its factorization.

55371240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4211 (or 4204 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 27.

The square root of 55371240 is about 7441.1853894390. The cubic root of 55371240 is about 381.1489693774.

Adding to 55371240 its reverse (4217355), we get a palindrome (59588595).

It can be divided in two parts, 55371 and 240, that added together give a triangular number (55611 = T₃₃₃).

The spelling of 55371240 in words is "fifty-five million, three hundred seventy-one thousand, two hundred forty".