253216461 has 4 divisors (see below), whose sum is σ = 337621952. Its totient is φ = 168810972.

The previous prime is 253216441. The next prime is 253216507. The reversal of 253216461 is 164612352.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 253216461 - 2¹¹ = 253214413 is a prime.

It is a super-2 number, since 2×253216461² = 128237152242729042, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253216441) 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 3 ways as a sum of consecutive naturals, for example, 42202741 + ... + 42202746.

It is an arithmetic number, because the mean of its divisors is an integer number (84405488).

Almost surely, 2^253216461 is an apocalyptic number.

It is an amenable number.

253216461 is a deficient number, since it is larger than the sum of its proper divisors (84405491).

253216461 is an equidigital number, since it uses as much as digits as its factorization.

253216461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84405490.

The product of its digits is 8640, while the sum is 30.

The square root of 253216461 is about 15912.7766590247. The cubic root of 253216461 is about 632.6506786364.

The spelling of 253216461 in words is "two hundred fifty-three million, two hundred sixteen thousand, four hundred sixty-one".