205425501 has 16 divisors (see below), whose sum is σ = 290563200. Its totient is φ = 128649728.

The previous prime is 205425469. The next prime is 205425541. The reversal of 205425501 is 105524502.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 205425501 - 2⁵ = 205425469 is a prime.

It is a super-2 number, since 2×205425501² = 84399272922202002, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (205425541) 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, 25480 + ... + 32558.

It is an arithmetic number, because the mean of its divisors is an integer number (18160200).

Almost surely, 2^205425501 is an apocalyptic number.

It is an amenable number.

205425501 is a deficient number, since it is larger than the sum of its proper divisors (85137699).

205425501 is a wasteful number, since it uses less digits than its factorization.

205425501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7668.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 205425501 is about 14332.6725002701. The cubic root of 205425501 is about 590.0445250320.

Subtracting from 205425501 its reverse (105524502), we obtain a palindrome (99900999).

The spelling of 205425501 in words is "two hundred five million, four hundred twenty-five thousand, five hundred one".