249153538 has 4 divisors (see below), whose sum is σ = 373730310. Its totient is φ = 124576768.

The previous prime is 249153511. The next prime is 249153557. The reversal of 249153538 is 835351942.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 835351942 = 2 ⋅417675971.

It can be written as a sum of positive squares in only one way, i.e., 248283049 + 870489 = 15757^2 + 933^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 249153538.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 62288383 + ... + 62288386.

Almost surely, 2^249153538 is an apocalyptic number.

249153538 is a deficient number, since it is larger than the sum of its proper divisors (124576772).

249153538 is a wasteful number, since it uses less digits than its factorization.

249153538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124576771.

The product of its digits is 129600, while the sum is 40.

The square root of 249153538 is about 15784.5981260215. The cubic root of 249153538 is about 629.2487374794.

The spelling of 249153538 in words is "two hundred forty-nine million, one hundred fifty-three thousand, five hundred thirty-eight".