205247490 has 32 divisors (see below), whose sum is σ = 562965120. Its totient is φ = 46913664.

The previous prime is 205247479. The next prime is 205247501. The reversal of 205247490 is 94742502.

It is an interprime number because it is at equal distance from previous prime (205247479) and next prime (205247501).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 488475 + ... + 488894.

It is an arithmetic number, because the mean of its divisors is an integer number (17592660).

Almost surely, 2^205247490 is an apocalyptic number.

205247490 is an abundant number, since it is smaller than the sum of its proper divisors (357717630).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205247490 is a wasteful number, since it uses less digits than its factorization.

205247490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 977386.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 205247490 is about 14326.4611820226. The cubic root of 205247490 is about 589.8740418655.

Adding to 205247490 its reverse (94742502), we get a palindrome (299989992).

The spelling of 205247490 in words is "two hundred five million, two hundred forty-seven thousand, four hundred ninety".