1631542131 has 6 divisors (see below), whose sum is σ = 2356671980. Its totient is φ = 1087694748.

The previous prime is 1631542123. The next prime is 1631542177. The reversal of 1631542131 is 1312451361.

It is a happy number.

1631542131 is a `hidden beast` number, since 1 + 631 + 5 + 4 + 21 + 3 + 1 = 666.

It is not a de Polignac number, because 1631542131 - 2³ = 1631542123 is a prime.

It is a super-2 number, since 2×1631542131² = 5323859450456042322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1631542095 and 1631542104.

It is not an unprimeable number, because it can be changed into a prime (1631547131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90641221 + ... + 90641238.

Almost surely, 2^1631542131 is an apocalyptic number.

1631542131 is a deficient number, since it is larger than the sum of its proper divisors (725129849).

1631542131 is a wasteful number, since it uses less digits than its factorization.

1631542131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181282465 (or 181282462 counting only the distinct ones).

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

The square root of 1631542131 is about 40392.3523825984. The cubic root of 1631542131 is about 1177.2429482028.

Adding to 1631542131 its reverse (1312451361), we get a palindrome (2943993492).

The spelling of 1631542131 in words is "one billion, six hundred thirty-one million, five hundred forty-two thousand, one hundred thirty-one".