253345537 has 12 divisors (see below), whose sum is σ = 265978260. Its totient is φ = 241025120.

The previous prime is 253345523. The next prime is 253345541. The reversal of 253345537 is 735543352.

It can be written as a sum of positive squares in 2 ways, for example, as 122677776 + 130667761 = 11076^2 + 11431^2 .

It is a de Polignac number, because none of the positive numbers 2^k-253345537 is a prime.

It is a super-2 number, since 2×253345537² = 128367922235636738, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 253345496 and 253345505.

It is not an unprimeable number, because it can be changed into a prime (253345567) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 145323 + ... + 147055.

It is an arithmetic number, because the mean of its divisors is an integer number (22164855).

Almost surely, 2^253345537 is an apocalyptic number.

It is an amenable number.

253345537 is a deficient number, since it is larger than the sum of its proper divisors (12632723).

253345537 is an equidigital number, since it uses as much as digits as its factorization.

253345537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1904 (or 1833 counting only the distinct ones).

The product of its digits is 189000, while the sum is 37.

The square root of 253345537 is about 15916.8318769785. The cubic root of 253345537 is about 632.7581573620.

Adding to 253345537 its reverse (735543352), we get a palindrome (988888889).

The spelling of 253345537 in words is "two hundred fifty-three million, three hundred forty-five thousand, five hundred thirty-seven".