31361154049 has 4 divisors (see below), whose sum is σ = 31372871764. Its totient is φ = 31349436336.

The previous prime is 31361154043. The next prime is 31361154091. The reversal of 31361154049 is 94045116313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94045116313 = 71 ⋅1324579103.

It can be written as a sum of positive squares in 2 ways, for example, as 1985593600 + 29375560449 = 44560^2 + 171393^2 .

It is a cyclic number.

It is not a de Polignac number, because 31361154049 - 2¹⁷ = 31361022977 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31361153999 and 31361154017.

It is not an unprimeable number, because it can be changed into a prime (31361154043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5854842 + ... + 5860195.

It is an arithmetic number, because the mean of its divisors is an integer number (7843217941).

Almost surely, 2^31361154049 is an apocalyptic number.

It is an amenable number.

31361154049 is a deficient number, since it is larger than the sum of its proper divisors (11717715).

31361154049 is a wasteful number, since it uses less digits than its factorization.

31361154049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11717714.

The product of its (nonzero) digits is 38880, while the sum is 37.

The spelling of 31361154049 in words is "thirty-one billion, three hundred sixty-one million, one hundred fifty-four thousand, forty-nine".