400165151 has 4 divisors (see below), whose sum is σ = 401882832. Its totient is φ = 398447472.

The previous prime is 400165141. The next prime is 400165219. The reversal of 400165151 is 151561004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400165151 - 2¹⁴ = 400148767 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400165121) 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, 858491 + ... + 858956.

It is an arithmetic number, because the mean of its divisors is an integer number (100470708).

Almost surely, 2^400165151 is an apocalyptic number.

400165151 is a deficient number, since it is larger than the sum of its proper divisors (1717681).

400165151 is a wasteful number, since it uses less digits than its factorization.

400165151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1717680.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 400165151 is about 20004.1283489184. The cubic root of 400165151 is about 736.9076893565.

The spelling of 400165151 in words is "four hundred million, one hundred sixty-five thousand, one hundred fifty-one".