55232431 has 2 divisors, whose sum is σ = 55232432. Its totient is φ = 55232430.

The previous prime is 55232383. The next prime is 55232467. The reversal of 55232431 is 13423255.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55232431 is a prime.

It is a super-2 number, since 2×55232431² = 6101242868339522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55232396 and 55232405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55232531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27616215 + 27616216.

It is an arithmetic number, because the mean of its divisors is an integer number (27616216).

Almost surely, 2^55232431 is an apocalyptic number.

55232431 is a deficient number, since it is larger than the sum of its proper divisors (1).

55232431 is an equidigital number, since it uses as much as digits as its factorization.

55232431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 25.

The square root of 55232431 is about 7431.8524608606. The cubic root of 55232431 is about 380.8302047421.

Adding to 55232431 its reverse (13423255), we get a palindrome (68655686).

The spelling of 55232431 in words is "fifty-five million, two hundred thirty-two thousand, four hundred thirty-one".