253015531 has 2 divisors, whose sum is σ = 253015532. Its totient is φ = 253015530.

The previous prime is 253015513. The next prime is 253015549. The reversal of 253015531 is 135510352.

Together with previous prime (253015513) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (253015513) and next prime (253015549).

It is a cyclic number.

It is not a de Polignac number, because 253015531 - 2¹⁷ = 252884459 is a prime.

It is a super-2 number, since 2×253015531² = 128033717854423922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 253015496 and 253015505.

It is not a weakly prime, because it can be changed into another prime (253015501) 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 as a sum of consecutive naturals, namely, 126507765 + 126507766.

It is an arithmetic number, because the mean of its divisors is an integer number (126507766).

Almost surely, 2^253015531 is an apocalyptic number.

253015531 is a deficient number, since it is larger than the sum of its proper divisors (1).

253015531 is an equidigital number, since it uses as much as digits as its factorization.

253015531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 253015531 is about 15906.4619258967. The cubic root of 253015531 is about 632.4832959703.

Adding to 253015531 its reverse (135510352), we get a palindrome (388525883).

The spelling of 253015531 in words is "two hundred fifty-three million, fifteen thousand, five hundred thirty-one".