138557050 has 12 divisors (see below), whose sum is σ = 257716206. Its totient is φ = 55422800.

The previous prime is 138557039. The next prime is 138557071. The reversal of 138557050 is 50755831.

It can be written as a sum of positive squares in 3 ways, for example, as 64304361 + 74252689 = 8019^2 + 8617^2 .

It is a super-2 number, since 2×138557050² = 38396112209405000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 138556997 and 138557015.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1385521 + ... + 1385620.

Almost surely, 2^138557050 is an apocalyptic number.

138557050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

138557050 is a deficient number, since it is larger than the sum of its proper divisors (119159156).

138557050 is a wasteful number, since it uses less digits than its factorization.

138557050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2771153 (or 2771148 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 34.

The square root of 138557050 is about 11771.0258686318. The cubic root of 138557050 is about 517.4593151831.

The spelling of 138557050 in words is "one hundred thirty-eight million, five hundred fifty-seven thousand, fifty".