400506151 has 4 divisors (see below), whose sum is σ = 400568904. Its totient is φ = 400443400.

The previous prime is 400506137. The next prime is 400506191. The reversal of 400506151 is 151605004.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400506151 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 (400506191) 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, 20560 + ... + 34981.

It is an arithmetic number, because the mean of its divisors is an integer number (100142226).

Almost surely, 2^400506151 is an apocalyptic number.

400506151 is a deficient number, since it is larger than the sum of its proper divisors (62753).

400506151 is an equidigital number, since it uses as much as digits as its factorization.

400506151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62752.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 400506151 is about 20012.6497745801. The cubic root of 400506151 is about 737.1169481069.

The spelling of 400506151 in words is "four hundred million, five hundred six thousand, one hundred fifty-one".