138202651 has 4 divisors (see below), whose sum is σ = 140095912. Its totient is φ = 136309392.

The previous prime is 138202633. The next prime is 138202663. The reversal of 138202651 is 156202831.

138202651 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: 156202831 = 31 ⋅5038801.

It is a cyclic number.

It is not a de Polignac number, because 138202651 - 2¹⁹ = 137678363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (138202601) 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, 946521 + ... + 946666.

It is an arithmetic number, because the mean of its divisors is an integer number (35023978).

Almost surely, 2^138202651 is an apocalyptic number.

138202651 is a deficient number, since it is larger than the sum of its proper divisors (1893261).

138202651 is an equidigital number, since it uses as much as digits as its factorization.

138202651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1893260.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 138202651 is about 11755.9623595859. The cubic root of 138202651 is about 517.0177554520.

It can be divided in two parts, 13820 and 2651, that added together give a triangular number (16471 = T₁₈₁).

The spelling of 138202651 in words is "one hundred thirty-eight million, two hundred two thousand, six hundred fifty-one".