31200243434 has 4 divisors (see below), whose sum is σ = 46800365154. Its totient is φ = 15600121716.

The previous prime is 31200243419. The next prime is 31200243439. The reversal of 31200243434 is 43434200213.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 18226350025 + 12973893409 = 135005^2 + 113903^2 .

It is a super-2 number, since 2×31200243434² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (31200243439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7800060857 + ... + 7800060860.

Almost surely, 2^31200243434 is an apocalyptic number.

31200243434 is a deficient number, since it is larger than the sum of its proper divisors (15600121720).

31200243434 is a wasteful number, since it uses less digits than its factorization.

31200243434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15600121719.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 31200243434 its reverse (43434200213), we get a palindrome (74634443647).

The spelling of 31200243434 in words is "thirty-one billion, two hundred million, two hundred forty-three thousand, four hundred thirty-four".