501425251 has 4 divisors (see below), whose sum is σ = 530920872. Its totient is φ = 471929632.

The previous prime is 501425227. The next prime is 501425263. The reversal of 501425251 is 152524105.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152524105 = 5 ⋅30504821.

It is a cyclic number.

It is not a de Polignac number, because 501425251 - 2⁹ = 501424739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (501428251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14747785 + ... + 14747818.

It is an arithmetic number, because the mean of its divisors is an integer number (132730218).

Almost surely, 2^501425251 is an apocalyptic number.

501425251 is a deficient number, since it is larger than the sum of its proper divisors (29495621).

501425251 is a wasteful number, since it uses less digits than its factorization.

501425251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29495620.

The product of its (nonzero) digits is 2000, while the sum is 25.

The square root of 501425251 is about 22392.5266774431. The cubic root of 501425251 is about 794.4539588619.

Adding to 501425251 its reverse (152524105), we get a palindrome (653949356).

The spelling of 501425251 in words is "five hundred one million, four hundred twenty-five thousand, two hundred fifty-one".