151785138 has 16 divisors (see below), whose sum is σ = 303954336. Its totient is φ = 50531040.

The previous prime is 151785121. The next prime is 151785143. The reversal of 151785138 is 831587151.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 151785096 and 151785105.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10731 + ... + 20462.

It is an arithmetic number, because the mean of its divisors is an integer number (18997146).

Almost surely, 2^151785138 is an apocalyptic number.

151785138 is an abundant number, since it is smaller than the sum of its proper divisors (152169198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

151785138 is a wasteful number, since it uses less digits than its factorization.

151785138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32009.

The product of its digits is 33600, while the sum is 39.

The square root of 151785138 is about 12320.1111196288. Note that the first 5 decimals coincide. The cubic root of 151785138 is about 533.4287470787.

The spelling of 151785138 in words is "one hundred fifty-one million, seven hundred eighty-five thousand, one hundred thirty-eight".