203115135112494 has 64 divisors (see below), whose sum is σ = 462430662819840. Its totient is φ = 58873630212320.

The previous prime is 203115135112493. The next prime is 203115135112537. The reversal of 203115135112494 is 494211531511302.

It is a super-2 number, since 2×203115135112494² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203115135112493) 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, 541627747 + ... + 542002625.

It is an arithmetic number, because the mean of its divisors is an integer number (7225479106560).

Almost surely, 2^{203115135112494} is an apocalyptic number.

203115135112494 is an abundant number, since it is smaller than the sum of its proper divisors (259315527707346).

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

203115135112494 is a wasteful number, since it uses less digits than its factorization.

203115135112494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731845.

The product of its (nonzero) digits is 129600, while the sum is 42.

Adding to 203115135112494 its reverse (494211531511302), we get a palindrome (697326666623796).

The spelling of 203115135112494 in words is "two hundred three trillion, one hundred fifteen billion, one hundred thirty-five million, one hundred twelve thousand, four hundred ninety-four".