205425651 has 8 divisors (see below), whose sum is σ = 276414160. Its totient is φ = 135693792.

The previous prime is 205425643. The next prime is 205425659. The reversal of 205425651 is 156524502.

It is an interprime number because it is at equal distance from previous prime (205425643) and next prime (205425659).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 205425651 - 2³ = 205425643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (205425659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313780 + ... + 314433.

It is an arithmetic number, because the mean of its divisors is an integer number (34551770).

Almost surely, 2^205425651 is an apocalyptic number.

205425651 is a deficient number, since it is larger than the sum of its proper divisors (70988509).

205425651 is a wasteful number, since it uses less digits than its factorization.

205425651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628325.

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 205425651 is about 14332.6777330686. The cubic root of 205425651 is about 590.0446686472.

The spelling of 205425651 in words is "two hundred five million, four hundred twenty-five thousand, six hundred fifty-one".