31519320238849 has 9 divisors (see below), whose sum is σ = 31560959555971. Its totient is φ = 31477735807600.

The previous prime is 31519320238831. The next prime is 31519320238867. The reversal of 31519320238849 is 94883202391513.

It is a happy number.

The square root of 31519320238849 is 5614207.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (31519320238831) and next prime (31519320238867).

It can be written as a sum of positive squares in only one way, i.e., 29209430930625 + 2309889308224 = 5404575^2 + 1519832^2 .

It is not a de Polignac number, because 31519320238849 - 2⁹ = 31519320238337 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31519320238793 and 31519320238802.

It is not an unprimeable number, because it can be changed into a prime (31519320238949) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 4811372124 + ... + 4811378674.

Almost surely, 2^{31519320238849} is an apocalyptic number.

31519320238849 is the 5614207-th square number.

31519320238849 is the 2807104-th centered octagonal number.

It is an amenable number.

31519320238849 is a deficient number, since it is larger than the sum of its proper divisors (41639317122).

31519320238849 is an frugal number, since it uses more digits than its factorization.

31519320238849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14816 (or 7408 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 58.

The spelling of 31519320238849 in words is "thirty-one trillion, five hundred nineteen billion, three hundred twenty million, two hundred thirty-eight thousand, eight hundred forty-nine".