31145401 has 4 divisors (see below), whose sum is σ = 35594752. Its totient is φ = 26696052.

The previous prime is 31145383. The next prime is 31145423. The reversal of 31145401 is 10454113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 31145401 - 2⁵ = 31145369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31145431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2224665 + ... + 2224678.

It is an arithmetic number, because the mean of its divisors is an integer number (8898688).

Almost surely, 2^31145401 is an apocalyptic number.

It is an amenable number.

31145401 is a deficient number, since it is larger than the sum of its proper divisors (4449351).

31145401 is an equidigital number, since it uses as much as digits as its factorization.

31145401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4449350.

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 31145401 is about 5580.8064829377. The cubic root of 31145401 is about 314.6284390255.

Adding to 31145401 its reverse (10454113), we get a palindrome (41599514).

It can be divided in two parts, 3114 and 5401, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 31145401 in words is "thirty-one million, one hundred forty-five thousand, four hundred one".