253128099 has 16 divisors (see below), whose sum is σ = 385961472. Its totient is φ = 144553728.

The previous prime is 253128097. The next prime is 253128103. The reversal of 253128099 is 990821352.

It is a Cunningham number, because it is equal to 15910²-1.

It is not a de Polignac number, because 253128099 - 2¹ = 253128097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (253128097) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45082 + ... + 50384.

It is an arithmetic number, because the mean of its divisors is an integer number (24122592).

Almost surely, 2^253128099 is an apocalyptic number.

253128099 is a deficient number, since it is larger than the sum of its proper divisors (132833373).

253128099 is a wasteful number, since it uses less digits than its factorization.

253128099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7586.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 253128099 is about 15909.9999685732. Note that the first 4 decimals coincide. The cubic root of 253128099 is about 632.5770804945.

It can be divided in two parts, 25312 and 8099, that added together give a triangular number (33411 = T₂₅₈).

The spelling of 253128099 in words is "two hundred fifty-three million, one hundred twenty-eight thousand, ninety-nine".