55540313 has 4 divisors (see below), whose sum is σ = 57331968. Its totient is φ = 53748660.

The previous prime is 55540301. The next prime is 55540319. The reversal of 55540313 is 31304555.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31304555 = 5 ⋅6260911.

It is a cyclic number.

It is not a de Polignac number, because 55540313 - 2⁴ = 55540297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55540319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 895781 + ... + 895842.

It is an arithmetic number, because the mean of its divisors is an integer number (14332992).

Almost surely, 2^55540313 is an apocalyptic number.

It is an amenable number.

55540313 is a deficient number, since it is larger than the sum of its proper divisors (1791655).

55540313 is a wasteful number, since it uses less digits than its factorization.

55540313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791654.

The product of its (nonzero) digits is 4500, while the sum is 26.

The square root of 55540313 is about 7452.5373531436. The cubic root of 55540313 is about 381.5365142516.

Adding to 55540313 its reverse (31304555), we get a palindrome (86844868).

The spelling of 55540313 in words is "fifty-five million, five hundred forty thousand, three hundred thirteen".