308728101131 has 4 divisors (see below), whose sum is σ = 310327728792. Its totient is φ = 307128473472.

The previous prime is 308728101043. The next prime is 308728101211. The reversal of 308728101131 is 131101827803.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 131101827803 = 1163 ⋅112727281.

It is a cyclic number.

It is not a de Polignac number, because 308728101131 - 2³⁸ = 33850194187 is a prime.

It is a super-2 number, since 2×308728101131² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 308728101091 and 308728101100.

It is not an unprimeable number, because it can be changed into a prime (308728301131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 799813541 + ... + 799813926.

It is an arithmetic number, because the mean of its divisors is an integer number (77581932198).

Almost surely, 2^308728101131 is an apocalyptic number.

308728101131 is a deficient number, since it is larger than the sum of its proper divisors (1599627661).

308728101131 is a wasteful number, since it uses less digits than its factorization.

308728101131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1599627660.

The product of its (nonzero) digits is 8064, while the sum is 35.

Adding to 308728101131 its reverse (131101827803), we get a palindrome (439829928934).

The spelling of 308728101131 in words is "three hundred eight billion, seven hundred twenty-eight million, one hundred one thousand, one hundred thirty-one".