253121455 has 4 divisors (see below), whose sum is σ = 303745752. Its totient is φ = 202497160.

The previous prime is 253121443. The next prime is 253121467. The reversal of 253121455 is 554121352.

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 (253121443) and next prime (253121467).

It is not a de Polignac number, because 253121455 - 2⁵ = 253121423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25312141 + ... + 25312150.

It is an arithmetic number, because the mean of its divisors is an integer number (75936438).

Almost surely, 2^253121455 is an apocalyptic number.

253121455 is a deficient number, since it is larger than the sum of its proper divisors (50624297).

253121455 is an equidigital number, since it uses as much as digits as its factorization.

253121455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50624296.

The product of its digits is 6000, while the sum is 28.

The square root of 253121455 is about 15909.7911677055. The cubic root of 253121455 is about 632.5715459069.

The spelling of 253121455 in words is "two hundred fifty-three million, one hundred twenty-one thousand, four hundred fifty-five".