139775038225 has 27 divisors (see below), whose sum is σ = 181240133179. Its totient is φ = 106925390000.

The previous prime is 139775038219. The next prime is 139775038289. The reversal of 139775038225 is 522830577931.

It is a happy number.

The square root of 139775038225 is 373865.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 50319013761 + 89456024464 = 224319^2 + 299092^2 .

It is not a de Polignac number, because 139775038225 - 2³ = 139775038217 is a prime.

It is a super-2 number, since 2×139775038225² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 42992850 + ... + 42996100.

Almost surely, 2^139775038225 is an apocalyptic number.

139775038225 is the 373865-th square number.

139775038225 is the 186933-rd centered octagonal number.

It is an amenable number.

139775038225 is a deficient number, since it is larger than the sum of its proper divisors (41465094954).

139775038225 is an frugal number, since it uses more digits than its factorization.

139775038225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6558 (or 3279 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 52.

The spelling of 139775038225 in words is "one hundred thirty-nine billion, seven hundred seventy-five million, thirty-eight thousand, two hundred twenty-five".