253520001 has 24 divisors (see below), whose sum is σ = 432943680. Its totient is φ = 139872096.

The previous prime is 253519993. The next prime is 253520009. The reversal of 253520001 is 100025352.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (253519993) and next prime (253520009).

It is not a de Polignac number, because 253520001 - 2³ = 253519993 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (253520009) 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, 67555 + ... + 71208.

It is an arithmetic number, because the mean of its divisors is an integer number (18039320).

Almost surely, 2^253520001 is an apocalyptic number.

253520001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

253520001 is a deficient number, since it is larger than the sum of its proper divisors (179423679).

253520001 is a wasteful number, since it uses less digits than its factorization.

253520001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138805 (or 138802 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 253520001 is about 15922.3114213986. The cubic root of 253520001 is about 632.9033716672.

Adding to 253520001 its reverse (100025352), we get a palindrome (353545353).

The spelling of 253520001 in words is "two hundred fifty-three million, five hundred twenty thousand, one".