205015323550 has 12 divisors (see below), whose sum is σ = 381328501896. Its totient is φ = 82006129400.

The previous prime is 205015323547. The next prime is 205015323563. The reversal of 205015323550 is 55323510502.

It is a super-2 number, since 2×205015323550² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2050153186 + ... + 2050153285.

It is an arithmetic number, because the mean of its divisors is an integer number (31777375158).

Almost surely, 2^205015323550 is an apocalyptic number.

205015323550 is a deficient number, since it is larger than the sum of its proper divisors (176313178346).

205015323550 is a wasteful number, since it uses less digits than its factorization.

205015323550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4100306483 (or 4100306478 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 31.

The spelling of 205015323550 in words is "two hundred five billion, fifteen million, three hundred twenty-three thousand, five hundred fifty".