401873551 has 8 divisors (see below), whose sum is σ = 408790800. Its totient is φ = 394967040.

The previous prime is 401873531. The next prime is 401873567. The reversal of 401873551 is 155378104.

It is a happy number.

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-401873551 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 (401873531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119055 + ... + 122383.

It is an arithmetic number, because the mean of its divisors is an integer number (51098850).

Almost surely, 2^401873551 is an apocalyptic number.

401873551 is a deficient number, since it is larger than the sum of its proper divisors (6917249).

401873551 is a wasteful number, since it uses less digits than its factorization.

401873551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5369.

The product of its (nonzero) digits is 16800, while the sum is 34.

The square root of 401873551 is about 20046.7840563019. The cubic root of 401873551 is about 737.9548784726.

The spelling of 401873551 in words is "four hundred one million, eight hundred seventy-three thousand, five hundred fifty-one".