61131001143 has 16 divisors (see below), whose sum is σ = 82248318720. Its totient is φ = 40384009344.

The previous prime is 61131001123. The next prime is 61131001181. The reversal of 61131001143 is 34110013116.

It is not a de Polignac number, because 61131001143 - 2⁶ = 61131001079 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61131001123) 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, 1643728 + ... + 1680506.

It is an arithmetic number, because the mean of its divisors is an integer number (5140519920).

Almost surely, 2^61131001143 is an apocalyptic number.

61131001143 is a deficient number, since it is larger than the sum of its proper divisors (21117317577).

61131001143 is a wasteful number, since it uses less digits than its factorization.

61131001143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41798.

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 61131001143 its reverse (34110013116), we get a palindrome (95241014259).

The spelling of 61131001143 in words is "sixty-one billion, one hundred thirty-one million, one thousand, one hundred forty-three".