31423101 has 16 divisors (see below), whose sum is σ = 43378368. Its totient is φ = 20217600.

The previous prime is 31423099. The next prime is 31423103. The reversal of 31423101 is 10132413.

It is an interprime number because it is at equal distance from previous prime (31423099) and next prime (31423103).

It is not a de Polignac number, because 31423101 - 2¹ = 31423099 is a prime.

It is a super-2 number, since 2×31423101² = 1974822552912402, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31423103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13461 + ... + 15621.

It is an arithmetic number, because the mean of its divisors is an integer number (2711148).

Almost surely, 2^31423101 is an apocalyptic number.

It is an amenable number.

31423101 is a deficient number, since it is larger than the sum of its proper divisors (11955267).

31423101 is a wasteful number, since it uses less digits than its factorization.

31423101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 31423101 is about 5605.6311865837. The cubic root of 31423101 is about 315.5607748417.

Adding to 31423101 its reverse (10132413), we get a palindrome (41555514).

The spelling of 31423101 in words is "thirty-one million, four hundred twenty-three thousand, one hundred one".