55045431 has 24 divisors (see below), whose sum is σ = 92121120. Its totient is φ = 31021056.

The previous prime is 55045423. The next prime is 55045447. The reversal of 55045431 is 13454055.

It is not a de Polignac number, because 55045431 - 2³ = 55045423 is a prime.

It is a super-2 number, since 2×55045431² = 6059998947951522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55045395 and 55045404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55045421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1386 + ... + 10583.

It is an arithmetic number, because the mean of its divisors is an integer number (3838380).

Almost surely, 2^55045431 is an apocalyptic number.

55045431 is a deficient number, since it is larger than the sum of its proper divisors (37075689).

55045431 is a wasteful number, since it uses less digits than its factorization.

55045431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12055 (or 12052 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 55045431 is about 7419.2608122373. The cubic root of 55045431 is about 380.3999275211.

Adding to 55045431 its reverse (13454055), we get a palindrome (68499486).

The spelling of 55045431 in words is "fifty-five million, forty-five thousand, four hundred thirty-one".