55125431 has 2 divisors, whose sum is σ = 55125432. Its totient is φ = 55125430.

The previous prime is 55125383. The next prime is 55125451. The reversal of 55125431 is 13452155.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55125431 is a prime.

It is a super-2 number, since 2×55125431² = 6077626285871522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55125431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55125451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27562715 + 27562716.

It is an arithmetic number, because the mean of its divisors is an integer number (27562716).

Almost surely, 2^55125431 is an apocalyptic number.

55125431 is a deficient number, since it is larger than the sum of its proper divisors (1).

55125431 is an equidigital number, since it uses as much as digits as its factorization.

55125431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3000, while the sum is 26.

The square root of 55125431 is about 7424.6502274518. The cubic root of 55125431 is about 380.5841224234.

Adding to 55125431 its reverse (13452155), we get a palindrome (68577586).

The spelling of 55125431 in words is "fifty-five million, one hundred twenty-five thousand, four hundred thirty-one".