55461431 has 2 divisors, whose sum is σ = 55461432. Its totient is φ = 55461430.

The previous prime is 55461421. The next prime is 55461433. The reversal of 55461431 is 13416455.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55461431 is a prime.

It is a super-2 number, since 2×55461431² = 6151940657135522, which contains 22 as substring.

Together with 55461433, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55461394 and 55461403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55461433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27730715 + 27730716.

It is an arithmetic number, because the mean of its divisors is an integer number (27730716).

Almost surely, 2^55461431 is an apocalyptic number.

55461431 is a deficient number, since it is larger than the sum of its proper divisors (1).

55461431 is an equidigital number, since it uses as much as digits as its factorization.

55461431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7200, while the sum is 29.

The square root of 55461431 is about 7447.2431812047. The cubic root of 55461431 is about 381.3558009329.

Adding to 55461431 its reverse (13416455), we get a palindrome (68877886).

The spelling of 55461431 in words is "fifty-five million, four hundred sixty-one thousand, four hundred thirty-one".