2981398031 has 4 divisors (see below), whose sum is σ = 3009261672. Its totient is φ = 2953534392.

The previous prime is 2981398003. The next prime is 2981398039. The reversal of 2981398031 is 1308931892.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2981398031 - 2¹⁸ = 2981135887 is a prime.

It is a super-2 number, since 2×2981398031² = 17777468438501353922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2981398039) 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, 13931660 + ... + 13931873.

It is an arithmetic number, because the mean of its divisors is an integer number (752315418).

Almost surely, 2^2981398031 is an apocalyptic number.

2981398031 is a deficient number, since it is larger than the sum of its proper divisors (27863641).

2981398031 is a wasteful number, since it uses less digits than its factorization.

2981398031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27863640.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 2981398031 is about 54602.1797275530. The cubic root of 2981398031 is about 1439.2624230382.

The spelling of 2981398031 in words is "two billion, nine hundred eighty-one million, three hundred ninety-eight thousand, thirty-one".