55161451 has 4 divisors (see below), whose sum is σ = 57063600. Its totient is φ = 53259304.

The previous prime is 55161443. The next prime is 55161461. The reversal of 55161451 is 15416155.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15416155 = 5 ⋅3083231.

It is a cyclic number.

It is not a de Polignac number, because 55161451 - 2³ = 55161443 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55161461) 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, 951031 + ... + 951088.

It is an arithmetic number, because the mean of its divisors is an integer number (14265900).

Almost surely, 2^55161451 is an apocalyptic number.

55161451 is a deficient number, since it is larger than the sum of its proper divisors (1902149).

55161451 is a wasteful number, since it uses less digits than its factorization.

55161451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1902148.

The product of its digits is 3000, while the sum is 28.

The square root of 55161451 is about 7427.0755348253. The cubic root of 55161451 is about 380.6669979983. Note that the first 3 decimals are identical.

The spelling of 55161451 in words is "fifty-five million, one hundred sixty-one thousand, four hundred fifty-one".