202040444257 has 4 divisors (see below), whose sum is σ = 203928672816. Its totient is φ = 200152215700.

The previous prime is 202040444219. The next prime is 202040444371. The reversal of 202040444257 is 752444040202.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202040444257 is a prime.

It is a super-2 number, since 2×202040444257² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (202040442257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 944114119 + ... + 944114332.

It is an arithmetic number, because the mean of its divisors is an integer number (50982168204).

Almost surely, 2^202040444257 is an apocalyptic number.

It is an amenable number.

202040444257 is a deficient number, since it is larger than the sum of its proper divisors (1888228559).

202040444257 is a wasteful number, since it uses less digits than its factorization.

202040444257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1888228558.

The product of its (nonzero) digits is 71680, while the sum is 34.

Adding to 202040444257 its reverse (752444040202), we get a palindrome (954484484459).

The spelling of 202040444257 in words is "two hundred two billion, forty million, four hundred forty-four thousand, two hundred fifty-seven".