201156020631 has 12 divisors (see below), whose sum is σ = 290590775800. Its totient is φ = 134089207920.

The previous prime is 201156020629. The next prime is 201156020633. The reversal of 201156020631 is 136020651102.

201156020631 is a `hidden beast` number, since 2 + 0 + 1 + 1 + 5 + 6 + 0 + 20 + 631 = 666.

It is an interprime number because it is at equal distance from previous prime (201156020629) and next prime (201156020633).

It is not a de Polignac number, because 201156020631 - 2¹ = 201156020629 is a prime.

It is a super-2 number, since 2×201156020631² (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 = 201156020595 and 201156020604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201156020633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1147456 + ... + 1311093.

Almost surely, 2^201156020631 is an apocalyptic number.

201156020631 is a deficient number, since it is larger than the sum of its proper divisors (89434755169).

201156020631 is a wasteful number, since it uses less digits than its factorization.

201156020631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2467646 (or 2467643 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 201156020631 its reverse (136020651102), we get a palindrome (337176671733).

The spelling of 201156020631 in words is "two hundred one billion, one hundred fifty-six million, twenty thousand, six hundred thirty-one".