249820200054 has 32 divisors (see below), whose sum is σ = 555995952480. Its totient is φ = 83147407200.

The previous prime is 249820200043. The next prime is 249820200089. The reversal of 249820200054 is 450002028942.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 249820199991 and 249820200018.

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, 3463777 + ... + 3535164.

It is an arithmetic number, because the mean of its divisors is an integer number (17374873515).

Almost surely, 2^249820200054 is an apocalyptic number.

249820200054 is an abundant number, since it is smaller than the sum of its proper divisors (306175752426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

249820200054 is a wasteful number, since it uses less digits than its factorization.

249820200054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999613 (or 6999607 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

Adding to 249820200054 its reverse (450002028942), we get a palindrome (699822228996).

The spelling of 249820200054 in words is "two hundred forty-nine billion, eight hundred twenty million, two hundred thousand, fifty-four".