245288424421 has 4 divisors (see below), whose sum is σ = 245512024812. Its totient is φ = 245064824032.

The previous prime is 245288424401. The next prime is 245288424431. The reversal of 245288424421 is 124424882542.

245288424421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 124424882542 = 2 ⋅62212441271.

It can be written as a sum of positive squares in 2 ways, for example, as 39432030625 + 205856393796 = 198575^2 + 453714^2 .

It is a cyclic number.

It is not a de Polignac number, because 245288424421 - 2¹³ = 245288416229 is a prime.

It is a super-2 number, since 2×245288424421² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (245288424401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 111798550 + ... + 111800743.

It is an arithmetic number, because the mean of its divisors is an integer number (61378006203).

Almost surely, 2^245288424421 is an apocalyptic number.

It is an amenable number.

245288424421 is a deficient number, since it is larger than the sum of its proper divisors (223600391).

245288424421 is a wasteful number, since it uses less digits than its factorization.

245288424421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223600390.

The product of its digits is 1310720, while the sum is 46.

The spelling of 245288424421 in words is "two hundred forty-five billion, two hundred eighty-eight million, four hundred twenty-four thousand, four hundred twenty-one".