253166121 has 32 divisors (see below), whose sum is σ = 406896000. Its totient is φ = 154643904.

The previous prime is 253166113. The next prime is 253166131. The reversal of 253166121 is 121661352.

253166121 is a `hidden beast` number, since 2 + 531 + 6 + 6 + 121 = 666.

It is not a de Polignac number, because 253166121 - 2³ = 253166113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253166131) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46195 + ... + 51383.

It is an arithmetic number, because the mean of its divisors is an integer number (12715500).

Almost surely, 2^253166121 is an apocalyptic number.

It is an amenable number.

253166121 is a deficient number, since it is larger than the sum of its proper divisors (153729879).

253166121 is a wasteful number, since it uses less digits than its factorization.

253166121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5350 (or 5344 counting only the distinct ones).

The product of its digits is 2160, while the sum is 27.

The square root of 253166121 is about 15911.1948325699. The cubic root of 253166121 is about 632.6087517335.

The spelling of 253166121 in words is "two hundred fifty-three million, one hundred sixty-six thousand, one hundred twenty-one".