253561655 has 16 divisors (see below), whose sum is σ = 308214720. Its totient is φ = 200239872.

The previous prime is 253561619. The next prime is 253561657. The reversal of 253561655 is 556165352.

It is a cyclic number.

It is not a de Polignac number, because 253561655 - 2²⁴ = 236784439 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253561657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134006 + ... + 135884.

It is an arithmetic number, because the mean of its divisors is an integer number (19263420).

Almost surely, 2^253561655 is an apocalyptic number.

253561655 is a deficient number, since it is larger than the sum of its proper divisors (54653065).

253561655 is a wasteful number, since it uses less digits than its factorization.

253561655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2218.

The product of its digits is 135000, while the sum is 38.

The square root of 253561655 is about 15923.6194064038. The cubic root of 253561655 is about 632.9380323294.

The spelling of 253561655 in words is "two hundred fifty-three million, five hundred sixty-one thousand, six hundred fifty-five".