139922551 has 4 divisors (see below), whose sum is σ = 139994752. Its totient is φ = 139850352.

The previous prime is 139922527. The next prime is 139922557. The reversal of 139922551 is 155229931.

139922551 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 155229931 = 607 ⋅255733.

It is a cyclic number.

It is not a de Polignac number, because 139922551 - 2⁹ = 139922039 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 139922551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (139922557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33111 + ... + 37096.

It is an arithmetic number, because the mean of its divisors is an integer number (34998688).

Almost surely, 2^139922551 is an apocalyptic number.

139922551 is a deficient number, since it is larger than the sum of its proper divisors (72201).

139922551 is an equidigital number, since it uses as much as digits as its factorization.

139922551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72200.

The product of its digits is 24300, while the sum is 37.

The square root of 139922551 is about 11828.8862958437. The cubic root of 139922551 is about 519.1536416955.

The spelling of 139922551 in words is "one hundred thirty-nine million, nine hundred twenty-two thousand, five hundred fifty-one".