201015661431 has 32 divisors (see below), whose sum is σ = 293827806720. Its totient is φ = 121481944704.

The previous prime is 201015661421. The next prime is 201015661433. The reversal of 201015661431 is 134166510102.

It is a happy number.

It is not a de Polignac number, because 201015661431 - 2¹³ = 201015653239 is a prime.

It is a super-2 number, since 2×201015661431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201015661433) 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, 2250286 + ... + 2337908.

It is an arithmetic number, because the mean of its divisors is an integer number (9182118960).

Almost surely, 2^201015661431 is an apocalyptic number.

201015661431 is a deficient number, since it is larger than the sum of its proper divisors (92812145289).

201015661431 is a wasteful number, since it uses less digits than its factorization.

201015661431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88695.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 201015661431 in words is "two hundred one billion, fifteen million, six hundred sixty-one thousand, four hundred thirty-one".