253032021 has 24 divisors (see below), whose sum is σ = 400199904. Its totient is φ = 152782560.

The previous prime is 253032007. The next prime is 253032041. The reversal of 253032021 is 120230352.

It is not a de Polignac number, because 253032021 - 2¹⁰ = 253030997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 253031985 and 253032003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253032041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22810 + ... + 32036.

It is an arithmetic number, because the mean of its divisors is an integer number (16674996).

Almost surely, 2^253032021 is an apocalyptic number.

It is an amenable number.

253032021 is a deficient number, since it is larger than the sum of its proper divisors (147167883).

253032021 is a wasteful number, since it uses less digits than its factorization.

253032021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9521 (or 9518 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 253032021 is about 15906.9802602505. The cubic root of 253032021 is about 632.4970361321.

Adding to 253032021 its reverse (120230352), we get a palindrome (373262373).

The spelling of 253032021 in words is "two hundred fifty-three million, thirty-two thousand, twenty-one".