204155415031 has 16 divisors (see below), whose sum is σ = 209592852480. Its totient is φ = 198812607840.

The previous prime is 204155415011. The next prime is 204155415059. The reversal of 204155415031 is 130514551402.

It is a cyclic number.

It is not a de Polignac number, because 204155415031 - 2⁵ = 204155414999 is a prime.

It is a super-2 number, since 2×204155415031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 204155414984 and 204155415002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (204155415011) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1412286 + ... + 1550116.

It is an arithmetic number, because the mean of its divisors is an integer number (13099553280).

Almost surely, 2^204155415031 is an apocalyptic number.

204155415031 is a deficient number, since it is larger than the sum of its proper divisors (5437437449).

204155415031 is a wasteful number, since it uses less digits than its factorization.

204155415031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138174.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 204155415031 its reverse (130514551402), we get a palindrome (334669966433).

The spelling of 204155415031 in words is "two hundred four billion, one hundred fifty-five million, four hundred fifteen thousand, thirty-one".