31144430102 has 4 divisors (see below), whose sum is σ = 46716645156. Its totient is φ = 15572215050.

The previous prime is 31144430101. The next prime is 31144430131. The reversal of 31144430102 is 20103444113.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20103444113 = 263 ⋅76438951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31144430101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7786107524 + ... + 7786107527.

It is an arithmetic number, because the mean of its divisors is an integer number (11679161289).

Almost surely, 2^31144430102 is an apocalyptic number.

31144430102 is a deficient number, since it is larger than the sum of its proper divisors (15572215054).

31144430102 is a wasteful number, since it uses less digits than its factorization.

31144430102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15572215053.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 31144430102 its reverse (20103444113), we get a palindrome (51247874215).

The spelling of 31144430102 in words is "thirty-one billion, one hundred forty-four million, four hundred thirty thousand, one hundred two".