31420325616553 has 8 divisors (see below), whose sum is σ = 31543862327208. Its totient is φ = 31296798818304.

The previous prime is 31420325616487. The next prime is 31420325616599. The reversal of 31420325616553 is 35561652302413.

It can be written as a sum of positive squares in 4 ways, for example, as 16932961641024 + 14487363975529 = 4114968^2 + 3806227^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31420325616553 - 2¹⁷ = 31420325485481 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31420325616353) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3906225 + ... + 8837377.

It is an arithmetic number, because the mean of its divisors is an integer number (3942982790901).

Almost surely, 2^{31420325616553} is an apocalyptic number.

It is an amenable number.

31420325616553 is a deficient number, since it is larger than the sum of its proper divisors (123536710655).

31420325616553 is a wasteful number, since it uses less digits than its factorization.

31420325616553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4956203.

The product of its (nonzero) digits is 1944000, while the sum is 46.

Adding to 31420325616553 its reverse (35561652302413), we get a palindrome (66981977918966).

The spelling of 31420325616553 in words is "thirty-one trillion, four hundred twenty billion, three hundred twenty-five million, six hundred sixteen thousand, five hundred fifty-three".