253517137442 has 8 divisors (see below), whose sum is σ = 380339304732. Its totient is φ = 126737369200.

The previous prime is 253517137441. The next prime is 253517137463. The reversal of 253517137442 is 244731715352.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 182729745961 + 70787391481 = 427469^2 + 266059^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 253517137393 and 253517137402.

It is not an unprimeable number, because it can be changed into a prime (253517137441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10584809 + ... + 10608732.

Almost surely, 2^253517137442 is an apocalyptic number.

253517137442 is a deficient number, since it is larger than the sum of its proper divisors (126822167290).

253517137442 is a wasteful number, since it uses less digits than its factorization.

253517137442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21199524.

The product of its digits is 705600, while the sum is 44.

The spelling of 253517137442 in words is "two hundred fifty-three billion, five hundred seventeen million, one hundred thirty-seven thousand, four hundred forty-two".