31319401 has 8 divisors (see below), whose sum is σ = 31664520. Its totient is φ = 30976512.

The previous prime is 31319381. The next prime is 31319411. The reversal of 31319401 is 10491313.

It can be written as a sum of positive squares in 4 ways, for example, as 2418025 + 28901376 = 1555^2 + 5376^2 .

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 31319401 - 2⁵ = 31319369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31319411) 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, 46201 + ... + 46873.

It is an arithmetic number, because the mean of its divisors is an integer number (3958065).

Almost surely, 2^31319401 is an apocalyptic number.

It is an amenable number.

31319401 is a deficient number, since it is larger than the sum of its proper divisors (345119).

31319401 is a wasteful number, since it uses less digits than its factorization.

31319401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1115.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 31319401 is about 5596.3739153134. The cubic root of 31319401 is about 315.2132628226.

The spelling of 31319401 in words is "thirty-one million, three hundred nineteen thousand, four hundred one".