253017553 has 2 divisors, whose sum is σ = 253017554. Its totient is φ = 253017552.

The previous prime is 253017529. The next prime is 253017559. The reversal of 253017553 is 355710352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 223293249 + 29724304 = 14943^2 + 5452^2 .

It is a cyclic number.

It is not a de Polignac number, because 253017553 - 2⁵ = 253017521 is a prime.

It is a super-2 number, since 2×253017553² = 128035764252215618, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (253017559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126508776 + 126508777.

It is an arithmetic number, because the mean of its divisors is an integer number (126508777).

Almost surely, 2^253017553 is an apocalyptic number.

It is an amenable number.

253017553 is a deficient number, since it is larger than the sum of its proper divisors (1).

253017553 is an equidigital number, since it uses as much as digits as its factorization.

253017553 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15750, while the sum is 31.

The square root of 253017553 is about 15906.5254848443. The cubic root of 253017553 is about 632.4849808179.

The spelling of 253017553 in words is "two hundred fifty-three million, seventeen thousand, five hundred fifty-three".