55623402031 has 2 divisors, whose sum is σ = 55623402032. Its totient is φ = 55623402030.

The previous prime is 55623402011. The next prime is 55623402049. The reversal of 55623402031 is 13020432655.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 55623402031 - 2⁷ = 55623401903 is a prime.

It is a super-2 number, since 2×55623402031² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 55623401984 and 55623402002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55623402001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27811701015 + 27811701016.

It is an arithmetic number, because the mean of its divisors is an integer number (27811701016).

Almost surely, 2^55623402031 is an apocalyptic number.

55623402031 is a deficient number, since it is larger than the sum of its proper divisors (1).

55623402031 is an equidigital number, since it uses as much as digits as its factorization.

55623402031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 31.

Adding to 55623402031 its reverse (13020432655), we get a palindrome (68643834686).

The spelling of 55623402031 in words is "fifty-five billion, six hundred twenty-three million, four hundred two thousand, thirty-one".