253138982 has 4 divisors (see below), whose sum is σ = 379708476. Its totient is φ = 126569490.

The previous prime is 253138973. The next prime is 253138987. The reversal of 253138982 is 289831352.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253138987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63284744 + ... + 63284747.

It is an arithmetic number, because the mean of its divisors is an integer number (94927119).

Almost surely, 2^253138982 is an apocalyptic number.

253138982 is a deficient number, since it is larger than the sum of its proper divisors (126569494).

253138982 is a wasteful number, since it uses less digits than its factorization.

253138982 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126569493.

The product of its digits is 103680, while the sum is 41.

The square root of 253138982 is about 15910.3419824968. The cubic root of 253138982 is about 632.5861460463.

The spelling of 253138982 in words is "two hundred fifty-three million, one hundred thirty-eight thousand, nine hundred eighty-two".