205053120031 has 4 divisors (see below), whose sum is σ = 205056673200. Its totient is φ = 205049566864.

The previous prime is 205053119903. The next prime is 205053120079. The reversal of 205053120031 is 130021350502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 205053120031 - 2⁷ = 205053119903 is a prime.

It is a super-2 number, since 2×205053120031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 205053119984 and 205053120011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205053120091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1688566 + ... + 1805923.

It is an arithmetic number, because the mean of its divisors is an integer number (51264168300).

Almost surely, 2^205053120031 is an apocalyptic number.

205053120031 is a deficient number, since it is larger than the sum of its proper divisors (3553169).

205053120031 is an equidigital number, since it uses as much as digits as its factorization.

205053120031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3553168.

The product of its (nonzero) digits is 900, while the sum is 22.

Adding to 205053120031 its reverse (130021350502), we get a palindrome (335074470533).

The spelling of 205053120031 in words is "two hundred five billion, fifty-three million, one hundred twenty thousand, thirty-one".