151384781 has 8 divisors (see below), whose sum is σ = 158443584. Its totient is φ = 144365760.

The previous prime is 151384771. The next prime is 151384787. The reversal of 151384781 is 187483151.

It is a happy number.

151384781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-151384781 is a prime.

It is a super-2 number, since 2×151384781² = 45834703836835922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (151384787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2015 + ... + 17516.

It is an arithmetic number, because the mean of its divisors is an integer number (19805448).

Almost surely, 2^151384781 is an apocalyptic number.

It is an amenable number.

151384781 is a deficient number, since it is larger than the sum of its proper divisors (7058803).

151384781 is a wasteful number, since it uses less digits than its factorization.

151384781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19891.

The product of its digits is 26880, while the sum is 38.

The square root of 151384781 is about 12303.8522829234. The cubic root of 151384781 is about 532.9593335841.

The spelling of 151384781 in words is "one hundred fifty-one million, three hundred eighty-four thousand, seven hundred eighty-one".