55494431 has 4 divisors (see below), whose sum is σ = 55701000. Its totient is φ = 55287864.

The previous prime is 55494427. The next prime is 55494503. The reversal of 55494431 is 13449455.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13449455 = 5 ⋅2689891.

It is a cyclic number.

It is not a de Polignac number, because 55494431 - 2² = 55494427 is a prime.

It is a super-2 number, since 2×55494431² = 6159263744027522, 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 = 55494391 and 55494400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55494401) 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, 102881 + ... + 103418.

It is an arithmetic number, because the mean of its divisors is an integer number (13925250).

Almost surely, 2^55494431 is an apocalyptic number.

55494431 is a deficient number, since it is larger than the sum of its proper divisors (206569).

55494431 is a wasteful number, since it uses less digits than its factorization.

55494431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206568.

The product of its digits is 43200, while the sum is 35.

The square root of 55494431 is about 7449.4584366919. The cubic root of 55494431 is about 381.4314225317.

The spelling of 55494431 in words is "fifty-five million, four hundred ninety-four thousand, four hundred thirty-one".