202453145 has 4 divisors (see below), whose sum is σ = 242943780. Its totient is φ = 161962512.

The previous prime is 202453133. The next prime is 202453169. The reversal of 202453145 is 541354202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 541354202 = 2 ⋅270677101.

It can be written as a sum of positive squares in 2 ways, for example, as 71098624 + 131354521 = 8432^2 + 11461^2 .

It is a cyclic number.

It is not a de Polignac number, because 202453145 - 2⁴ = 202453129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20245310 + ... + 20245319.

It is an arithmetic number, because the mean of its divisors is an integer number (60735945).

Almost surely, 2^202453145 is an apocalyptic number.

It is an amenable number.

202453145 is a deficient number, since it is larger than the sum of its proper divisors (40490635).

202453145 is an equidigital number, since it uses as much as digits as its factorization.

202453145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40490634.

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 202453145 is about 14228.6030586281. The cubic root of 202453145 is about 587.1848510463.

The spelling of 202453145 in words is "two hundred two million, four hundred fifty-three thousand, one hundred forty-five".