203104561631 has 8 divisors (see below), whose sum is σ = 204924007728. Its totient is φ = 201289192000.

The previous prime is 203104561537. The next prime is 203104561633. The reversal of 203104561631 is 136165401302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203104561631 is a prime.

It is a super-2 number, since 2×203104561631² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (203104561633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 918980 + ... + 1118361.

It is an arithmetic number, because the mean of its divisors is an integer number (25615500966).

Almost surely, 2^203104561631 is an apocalyptic number.

203104561631 is a deficient number, since it is larger than the sum of its proper divisors (1819446097).

203104561631 is a wasteful number, since it uses less digits than its factorization.

203104561631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2038233.

The product of its (nonzero) digits is 12960, while the sum is 32.

Adding to 203104561631 its reverse (136165401302), we get a palindrome (339269962933).

The spelling of 203104561631 in words is "two hundred three billion, one hundred four million, five hundred sixty-one thousand, six hundred thirty-one".