31402241 has 4 divisors (see below), whose sum is σ = 33817812. Its totient is φ = 28986672.

The previous prime is 31402223. The next prime is 31402243. The reversal of 31402241 is 14220413.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3534400 + 27867841 = 1880^2 + 5279^2 .

It is not a de Polignac number, because 31402241 - 2⁶ = 31402177 is a prime.

It is a super-2 number, since 2×31402241² = 1972201479644162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31402243) 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, 1207766 + ... + 1207791.

It is an arithmetic number, because the mean of its divisors is an integer number (8454453).

Almost surely, 2^31402241 is an apocalyptic number.

It is an amenable number.

31402241 is a deficient number, since it is larger than the sum of its proper divisors (2415571).

31402241 is a wasteful number, since it uses less digits than its factorization.

31402241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2415570.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 31402241 is about 5603.7702486808. The cubic root of 31402241 is about 315.4909317995.

Adding to 31402241 its reverse (14220413), we get a palindrome (45622654).

The spelling of 31402241 in words is "thirty-one million, four hundred two thousand, two hundred forty-one".