31154350427 has 4 divisors (see below), whose sum is σ = 31996359936. Its totient is φ = 30312340920.

The previous prime is 31154350417. The next prime is 31154350429. The reversal of 31154350427 is 72405345113.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31154350427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31154350429) 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, 421004699 + ... + 421004772.

It is an arithmetic number, because the mean of its divisors is an integer number (7999089984).

Almost surely, 2^31154350427 is an apocalyptic number.

31154350427 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

31154350427 is a deficient number, since it is larger than the sum of its proper divisors (842009509).

31154350427 is an equidigital number, since it uses as much as digits as its factorization.

31154350427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 842009508.

The product of its (nonzero) digits is 50400, while the sum is 35.

The spelling of 31154350427 in words is "thirty-one billion, one hundred fifty-four million, three hundred fifty thousand, four hundred twenty-seven".