203245213553421 has 32 divisors (see below), whose sum is σ = 293817881481600. Its totient is φ = 124226119929600.

The previous prime is 203245213553419. The next prime is 203245213553449. The reversal of 203245213553421 is 124355312542302.

203245213553421 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 203245213553421 - 2¹ = 203245213553419 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203245213553521) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 84944886 + ... + 87304776.

It is an arithmetic number, because the mean of its divisors is an integer number (9181808796300).

Almost surely, 2^{203245213553421} is an apocalyptic number.

It is an amenable number.

203245213553421 is a deficient number, since it is larger than the sum of its proper divisors (90572667928179).

203245213553421 is a wasteful number, since it uses less digits than its factorization.

203245213553421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2374877.

The product of its (nonzero) digits is 864000, while the sum is 42.

The spelling of 203245213553421 in words is "two hundred three trillion, two hundred forty-five billion, two hundred thirteen million, five hundred fifty-three thousand, four hundred twenty-one".