401966551 has 12 divisors (see below), whose sum is σ = 469547760. Its totient is φ = 343103040.

The previous prime is 401966549. The next prime is 401966573. The reversal of 401966551 is 155669104.

It is not a de Polignac number, because 401966551 - 2¹ = 401966549 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401966551.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401966051) 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 11 ways as a sum of consecutive naturals, for example, 5211 + ... + 28828.

It is an arithmetic number, because the mean of its divisors is an integer number (39128980).

Almost surely, 2^401966551 is an apocalyptic number.

401966551 is a deficient number, since it is larger than the sum of its proper divisors (67581209).

401966551 is a wasteful number, since it uses less digits than its factorization.

401966551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34294 (or 34287 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 37.

The square root of 401966551 is about 20049.1034961666. The cubic root of 401966551 is about 738.0117989560.

The spelling of 401966551 in words is "four hundred one million, nine hundred sixty-six thousand, five hundred fifty-one".