245434132021 has 8 divisors (see below), whose sum is σ = 268646692664. Its totient is φ = 222840573120.

The previous prime is 245434132019. The next prime is 245434132033. The reversal of 245434132021 is 120231434542.

It can be written as a sum of positive squares in 4 ways, for example, as 161569521 + 245272562500 = 12711^2 + 495250^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 245434132021 - 2¹ = 245434132019 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245434132001) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 154749606 + ... + 154751191.

It is an arithmetic number, because the mean of its divisors is an integer number (33580836583).

Almost surely, 2^245434132021 is an apocalyptic number.

It is an amenable number.

245434132021 is a deficient number, since it is larger than the sum of its proper divisors (23212560643).

245434132021 is a wasteful number, since it uses less digits than its factorization.

245434132021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309500871.

The product of its (nonzero) digits is 23040, while the sum is 31.

Adding to 245434132021 its reverse (120231434542), we get a palindrome (365665566563).

The spelling of 245434132021 in words is "two hundred forty-five billion, four hundred thirty-four million, one hundred thirty-two thousand, twenty-one".