252780531 has 32 divisors (see below), whose sum is σ = 370402560. Its totient is φ = 152699904.

The previous prime is 252780529. The next prime is 252780533. The reversal of 252780531 is 135087252.

It is an interprime number because it is at equal distance from previous prime (252780529) and next prime (252780533).

It is not a de Polignac number, because 252780531 - 2¹ = 252780529 is a prime.

It is a super-2 number, since 2×252780531² = 127795993705283922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 252780492 and 252780501.

It is not an unprimeable number, because it can be changed into a prime (252780533) 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 31 ways as a sum of consecutive naturals, for example, 159300 + ... + 160878.

It is an arithmetic number, because the mean of its divisors is an integer number (11575080).

Almost surely, 2^252780531 is an apocalyptic number.

252780531 is a deficient number, since it is larger than the sum of its proper divisors (117622029).

252780531 is a wasteful number, since it uses less digits than its factorization.

252780531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1715.

The product of its (nonzero) digits is 16800, while the sum is 33.

The square root of 252780531 is about 15899.0732748799. The cubic root of 252780531 is about 632.2874191737.

The spelling of 252780531 in words is "two hundred fifty-two million, seven hundred eighty thousand, five hundred thirty-one".