31434137 has 6 divisors (see below), whose sum is σ = 36566298. Its totient is φ = 26943504.

The previous prime is 31434107. The next prime is 31434149. The reversal of 31434137 is 73143413.

It can be written as a sum of positive squares in only one way, i.e., 22458121 + 8976016 = 4739^2 + 2996^2 .

It is not a de Polignac number, because 31434137 - 2¹⁰ = 31433113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31434107) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 320708 + ... + 320805.

It is an arithmetic number, because the mean of its divisors is an integer number (6094383).

Almost surely, 2^31434137 is an apocalyptic number.

It is an amenable number.

31434137 is a deficient number, since it is larger than the sum of its proper divisors (5132161).

31434137 is an equidigital number, since it uses as much as digits as its factorization.

31434137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 641527 (or 641520 counting only the distinct ones).

The product of its digits is 3024, while the sum is 26.

The square root of 31434137 is about 5606.6154674634. The cubic root of 31434137 is about 315.5977128584.

The spelling of 31434137 in words is "thirty-one million, four hundred thirty-four thousand, one hundred thirty-seven".