205551430 has 32 divisors (see below), whose sum is σ = 424569600. Its totient is φ = 70188000.

The previous prime is 205551419. The next prime is 205551431. The reversal of 205551430 is 34155502.

It is a junction number, because it is equal to n+sod(n) for n = 205551395 and 205551404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205551431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11721 + ... + 23419.

It is an arithmetic number, because the mean of its divisors is an integer number (13267800).

Almost surely, 2^205551430 is an apocalyptic number.

205551430 is an abundant number, since it is smaller than the sum of its proper divisors (219018170).

205551430 is a wasteful number, since it uses less digits than its factorization.

205551430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11964.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 205551430 is about 14337.0649018549. The cubic root of 205551430 is about 590.1650692012.

The spelling of 205551430 in words is "two hundred five million, five hundred fifty-one thousand, four hundred thirty".