55413431 has 2 divisors, whose sum is σ = 55413432. Its totient is φ = 55413430.

The previous prime is 55413409. The next prime is 55413469. The reversal of 55413431 is 13431455.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55413431 is a prime.

It is a super-2 number, since 2×55413431² = 6141296670383522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55413431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55412431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27706715 + 27706716.

It is an arithmetic number, because the mean of its divisors is an integer number (27706716).

Almost surely, 2^55413431 is an apocalyptic number.

55413431 is a deficient number, since it is larger than the sum of its proper divisors (1).

55413431 is an equidigital number, since it uses as much as digits as its factorization.

55413431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3600, while the sum is 26.

The square root of 55413431 is about 7444.0198145894. The cubic root of 55413431 is about 381.2457523132.

Adding to 55413431 its reverse (13431455), we get a palindrome (68844886).

The spelling of 55413431 in words is "fifty-five million, four hundred thirteen thousand, four hundred thirty-one".