151878139 has 4 divisors (see below), whose sum is σ = 173575024. Its totient is φ = 130181256.

The previous prime is 151878127. The next prime is 151878143. The reversal of 151878139 is 931878151.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931878151 = 61 ⋅15276691.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151878139 is a prime.

It is a super-2 number, since 2×151878139² = 46133938212206642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 151878095 and 151878104.

It is not an unprimeable number, because it can be changed into a prime (151878239) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 10848432 + ... + 10848445.

It is an arithmetic number, because the mean of its divisors is an integer number (43393756).

Almost surely, 2^151878139 is an apocalyptic number.

151878139 is a deficient number, since it is larger than the sum of its proper divisors (21696885).

151878139 is an equidigital number, since it uses as much as digits as its factorization.

151878139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21696884.

The product of its digits is 60480, while the sum is 43.

The square root of 151878139 is about 12323.8848988458. The cubic root of 151878139 is about 533.5376713973.

The spelling of 151878139 in words is "one hundred fifty-one million, eight hundred seventy-eight thousand, one hundred thirty-nine".