139313551 has 4 divisors (see below), whose sum is σ = 150029992. Its totient is φ = 128597112.

The previous prime is 139313543. The next prime is 139313557. The reversal of 139313551 is 155313931.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155313931 = 4999 ⋅31069.

It is a cyclic number.

It is not a de Polignac number, because 139313551 - 2³ = 139313543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139313557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5358201 + ... + 5358226.

It is an arithmetic number, because the mean of its divisors is an integer number (37507498).

Almost surely, 2^139313551 is an apocalyptic number.

139313551 is a deficient number, since it is larger than the sum of its proper divisors (10716441).

139313551 is a wasteful number, since it uses less digits than its factorization.

139313551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10716440.

The product of its digits is 6075, while the sum is 31.

The square root of 139313551 is about 11803.1161563377. The cubic root of 139313551 is about 518.3993568661.

The spelling of 139313551 in words is "one hundred thirty-nine million, three hundred thirteen thousand, five hundred fifty-one".