31302423242 has 4 divisors (see below), whose sum is σ = 46953634866. Its totient is φ = 15651211620.

The previous prime is 31302423211. The next prime is 31302423247. The reversal of 31302423242 is 24232420313.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24232420313 = 17 ⋅1425436489.

It can be written as a sum of positive squares in only one way, i.e., 31202042881 + 100380361 = 176641^2 + 10019^2 .

It is not an unprimeable number, because it can be changed into a prime (31302423247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7825605809 + ... + 7825605812.

Almost surely, 2^31302423242 is an apocalyptic number.

31302423242 is a deficient number, since it is larger than the sum of its proper divisors (15651211624).

31302423242 is a wasteful number, since it uses less digits than its factorization.

31302423242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15651211623.

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

Adding to 31302423242 its reverse (24232420313), we get a palindrome (55534843555).

The spelling of 31302423242 in words is "thirty-one billion, three hundred two million, four hundred twenty-three thousand, two hundred forty-two".