253099474 has 4 divisors (see below), whose sum is σ = 379649214. Its totient is φ = 126549736.

The previous prime is 253099471. The next prime is 253099477. The reversal of 253099474 is 474990352.

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

It is an interprime number because it is at equal distance from previous prime (253099471) and next prime (253099477).

It can be written as a sum of positive squares in only one way, i.e., 234549225 + 18550249 = 15315^2 + 4307^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 253099474.

It is not an unprimeable number, because it can be changed into a prime (253099471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63274867 + ... + 63274870.

Almost surely, 2^253099474 is an apocalyptic number.

253099474 is a deficient number, since it is larger than the sum of its proper divisors (126549740).

253099474 is a wasteful number, since it uses less digits than its factorization.

253099474 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126549739.

The product of its (nonzero) digits is 272160, while the sum is 43.

The square root of 253099474 is about 15909.1003516855. The cubic root of 253099474 is about 632.5532345951.

The spelling of 253099474 in words is "two hundred fifty-three million, ninety-nine thousand, four hundred seventy-four".