55115401 has 4 divisors (see below), whose sum is σ = 60125904. Its totient is φ = 50104900.

The previous prime is 55115363. The next prime is 55115413. The reversal of 55115401 is 10451155.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 55115401 - 2⁷ = 55115273 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55115441) 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, 2505235 + ... + 2505256.

It is an arithmetic number, because the mean of its divisors is an integer number (15031476).

Almost surely, 2^55115401 is an apocalyptic number.

It is an amenable number.

55115401 is a deficient number, since it is larger than the sum of its proper divisors (5010503).

55115401 is a wasteful number, since it uses less digits than its factorization.

55115401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5010502.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 55115401 is about 7423.9747440303. The cubic root of 55115401 is about 380.5610387624.

Adding to 55115401 its reverse (10451155), we get a palindrome (65566556).

The spelling of 55115401 in words is "fifty-five million, one hundred fifteen thousand, four hundred one".