31421123 has 8 divisors (see below), whose sum is σ = 32691600. Its totient is φ = 30163168.

The previous prime is 31421111. The next prime is 31421141. The reversal of 31421123 is 32112413.

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 31421123 - 2⁴ = 31421107 is a prime.

It is a super-2 number, since 2×31421123² = 1974573941162258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31421153) 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, 2165 + ... + 8217.

It is an arithmetic number, because the mean of its divisors is an integer number (4086450).

Almost surely, 2^31421123 is an apocalyptic number.

31421123 is a deficient number, since it is larger than the sum of its proper divisors (1270477).

31421123 is a wasteful number, since it uses less digits than its factorization.

31421123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6261.

The product of its digits is 144, while the sum is 17.

The square root of 31421123 is about 5605.4547540766. The cubic root of 31421123 is about 315.5541534677.

Adding to 31421123 its reverse (32112413), we get a palindrome (63533536).

The spelling of 31421123 in words is "thirty-one million, four hundred twenty-one thousand, one hundred twenty-three".