55240331 has 8 divisors (see below), whose sum is σ = 57380400. Its totient is φ = 53116000.

The previous prime is 55240321. The next prime is 55240417. The reversal of 55240331 is 13304255.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 55240331 - 2¹⁴ = 55223947 is a prime.

It is a super-2 number, since 2×55240331² = 6102988337979122, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55240297 and 55240306.

It is not an unprimeable number, because it can be changed into a prime (55240321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3485 + ... + 11073.

It is an arithmetic number, because the mean of its divisors is an integer number (7172550).

Almost surely, 2^55240331 is an apocalyptic number.

55240331 is a deficient number, since it is larger than the sum of its proper divisors (2140069).

55240331 is a wasteful number, since it uses less digits than its factorization.

55240331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7869.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 55240331 is about 7432.3839378762. The cubic root of 55240331 is about 380.8483608335.

Adding to 55240331 its reverse (13304255), we get a palindrome (68544586).

The spelling of 55240331 in words is "fifty-five million, two hundred forty thousand, three hundred thirty-one".