31402427 has 8 divisors (see below), whose sum is σ = 36723456. Its totient is φ = 26290152.

The previous prime is 31402409. The next prime is 31402471. The reversal of 31402427 is 72420413.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31402427 - 2⁸ = 31402171 is a prime.

It is a super-2 number, since 2×31402427² = 1972224842980658, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31402477) 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 7 ways as a sum of consecutive naturals, for example, 51863 + ... + 52464.

It is an arithmetic number, because the mean of its divisors is an integer number (4590432).

Almost surely, 2^31402427 is an apocalyptic number.

31402427 is a deficient number, since it is larger than the sum of its proper divisors (5321029).

31402427 is a wasteful number, since it uses less digits than its factorization.

31402427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104377.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 31402427 is about 5603.7868446257. The cubic root of 31402427 is about 315.4915546977.

The spelling of 31402427 in words is "thirty-one million, four hundred two thousand, four hundred twenty-seven".