31213153403 has 8 divisors (see below), whose sum is σ = 31327430400. Its totient is φ = 31099028968.

The previous prime is 31213153397. The next prime is 31213153471. The reversal of 31213153403 is 30435131213.

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 31213153403 - 2¹² = 31213149307 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31213153483) 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, 380138 + ... + 454896.

It is an arithmetic number, because the mean of its divisors is an integer number (3915928800).

Almost surely, 2^31213153403 is an apocalyptic number.

31213153403 is a deficient number, since it is larger than the sum of its proper divisors (114276997).

31213153403 is a wasteful number, since it uses less digits than its factorization.

31213153403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76281.

The product of its (nonzero) digits is 3240, while the sum is 26.

Adding to 31213153403 its reverse (30435131213), we get a palindrome (61648284616).

The spelling of 31213153403 in words is "thirty-one billion, two hundred thirteen million, one hundred fifty-three thousand, four hundred three".