400651255 has 4 divisors (see below), whose sum is σ = 480781512. Its totient is φ = 320521000.

The previous prime is 400651249. The next prime is 400651259. The reversal of 400651255 is 552156004.

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

It is not a de Polignac number, because 400651255 - 2³ = 400651247 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 (400651259) 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, 40065121 + ... + 40065130.

It is an arithmetic number, because the mean of its divisors is an integer number (120195378).

Almost surely, 2^400651255 is an apocalyptic number.

400651255 is a deficient number, since it is larger than the sum of its proper divisors (80130257).

400651255 is an equidigital number, since it uses as much as digits as its factorization.

400651255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80130256.

The product of its (nonzero) digits is 6000, while the sum is 28.

The square root of 400651255 is about 20016.2747533101. The cubic root of 400651255 is about 737.2059568965.

The spelling of 400651255 in words is "four hundred million, six hundred fifty-one thousand, two hundred fifty-five".