31545434 has 8 divisors (see below), whose sum is σ = 49808640. Its totient is φ = 14942556.

The previous prime is 31545407. The next prime is 31545439. The reversal of 31545434 is 43454513.

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

It is a super-2 number, since 2×31545434² = 1990228812496712, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 31545397 and 31545406.

It is not an unprimeable number, because it can be changed into a prime (31545439) 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, 415034 + ... + 415109.

It is an arithmetic number, because the mean of its divisors is an integer number (6226080).

Almost surely, 2^31545434 is an apocalyptic number.

31545434 is a deficient number, since it is larger than the sum of its proper divisors (18263206).

31545434 is a wasteful number, since it uses less digits than its factorization.

31545434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830164.

The product of its digits is 14400, while the sum is 29.

The square root of 31545434 is about 5616.5322041274. The cubic root of 31545434 is about 315.9697468767.

Adding to 31545434 its reverse (43454513), we get a palindrome (74999947).

The spelling of 31545434 in words is "thirty-one million, five hundred forty-five thousand, four hundred thirty-four".