401043551 has 4 divisors (see below), whose sum is σ = 401083704. Its totient is φ = 401003400.

The previous prime is 401043547. The next prime is 401043557. The reversal of 401043551 is 155340104.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 401043551 - 2² = 401043547 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 (401043557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7916 + ... + 29406.

It is an arithmetic number, because the mean of its divisors is an integer number (100270926).

Almost surely, 2^401043551 is an apocalyptic number.

401043551 is a deficient number, since it is larger than the sum of its proper divisors (40153).

401043551 is a wasteful number, since it uses less digits than its factorization.

401043551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40152.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 401043551 is about 20026.0717815552. The cubic root of 401043551 is about 737.4464891176.

Adding to 401043551 its reverse (155340104), we get a palindrome (556383655).

The spelling of 401043551 in words is "four hundred one million, forty-three thousand, five hundred fifty-one".