245213143405 has 16 divisors (see below), whose sum is σ = 297337514544. Its totient is φ = 194118220800.

The previous prime is 245213143387. The next prime is 245213143411. The reversal of 245213143405 is 504341312542.

It can be written as a sum of positive squares in 8 ways, for example, as 21841588521 + 223371554884 = 147789^2 + 472622^2 .

It is a de Polignac number, because none of the positive numbers 2^k-245213143405 is a prime.

It is a super-2 number, since 2×245213143405² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 760759 + ... + 1034011.

It is an arithmetic number, because the mean of its divisors is an integer number (18583594659).

Almost surely, 2^245213143405 is an apocalyptic number.

It is an amenable number.

245213143405 is a deficient number, since it is larger than the sum of its proper divisors (52124371139).

245213143405 is a wasteful number, since it uses less digits than its factorization.

245213143405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275136.

The product of its (nonzero) digits is 57600, while the sum is 34.

Adding to 245213143405 its reverse (504341312542), we get a palindrome (749554455947).

The spelling of 245213143405 in words is "two hundred forty-five billion, two hundred thirteen million, one hundred forty-three thousand, four hundred five".