252778000501 has 4 divisors (see below), whose sum is σ = 272222462092. Its totient is φ = 233333538912.

The previous prime is 252778000469. The next prime is 252778000523. The reversal of 252778000501 is 105000877252.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 33552714276 + 219225286225 = 183174^2 + 468215^2 .

It is a cyclic number.

It is not a de Polignac number, because 252778000501 - 2⁵ = 252778000469 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252778000801) 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, 9722230776 + ... + 9722230801.

It is an arithmetic number, because the mean of its divisors is an integer number (68055615523).

Almost surely, 2^252778000501 is an apocalyptic number.

It is an amenable number.

252778000501 is a deficient number, since it is larger than the sum of its proper divisors (19444461591).

252778000501 is a wasteful number, since it uses less digits than its factorization.

252778000501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19444461590.

The product of its (nonzero) digits is 39200, while the sum is 37.

Adding to 252778000501 its reverse (105000877252), we get a palindrome (357778877753).

The spelling of 252778000501 in words is "two hundred fifty-two billion, seven hundred seventy-eight million, five hundred one", and thus it is an aban number.