55103131 has 2 divisors, whose sum is σ = 55103132. Its totient is φ = 55103130.

The previous prime is 55103117. The next prime is 55103143. The reversal of 55103131 is 13130155.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55103131 - 2⁵ = 55103099 is a prime.

It is a super-2 number, since 2×55103131² = 6072710092006322, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 55103099 and 55103108.

It is not a weakly prime, because it can be changed into another prime (55103231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27551565 + 27551566.

It is an arithmetic number, because the mean of its divisors is an integer number (27551566).

Almost surely, 2^55103131 is an apocalyptic number.

55103131 is a deficient number, since it is larger than the sum of its proper divisors (1).

55103131 is an equidigital number, since it uses as much as digits as its factorization.

55103131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 55103131 is about 7423.1483212987. The cubic root of 55103131 is about 380.5327960183.

Adding to 55103131 its reverse (13130155), we get a palindrome (68233286).

The spelling of 55103131 in words is "fifty-five million, one hundred three thousand, one hundred thirty-one".