5551511103431 has 2 divisors, whose sum is σ = 5551511103432. Its totient is φ = 5551511103430.

The previous prime is 5551511103427. The next prime is 5551511103533. The reversal of 5551511103431 is 1343011151555.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5551511103431 - 2² = 5551511103427 is a prime.

It is a super-2 number, since 2×5551511103431² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 5551511103391 and 5551511103400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5551511103631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2775755551715 + 2775755551716.

It is an arithmetic number, because the mean of its divisors is an integer number (2775755551716).

Almost surely, 2^{5551511103431} is an apocalyptic number.

5551511103431 is a deficient number, since it is larger than the sum of its proper divisors (1).

5551511103431 is an equidigital number, since it uses as much as digits as its factorization.

5551511103431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22500, while the sum is 35.

Adding to 5551511103431 its reverse (1343011151555), we get a palindrome (6894522254986).

The spelling of 5551511103431 in words is "five trillion, five hundred fifty-one billion, five hundred eleven million, one hundred three thousand, four hundred thirty-one".