401551141 has 2 divisors, whose sum is σ = 401551142. Its totient is φ = 401551140.

The previous prime is 401551061. The next prime is 401551147. The reversal of 401551141 is 141155104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 281736225 + 119814916 = 16785^2 + 10946^2 .

It is a cyclic number.

It is not a de Polignac number, because 401551141 - 2¹⁵ = 401518373 is a prime.

It is a super-2 number, since 2×401551141² = 322486637676803762, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (401551147) 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 as a sum of consecutive naturals, namely, 200775570 + 200775571.

It is an arithmetic number, because the mean of its divisors is an integer number (200775571).

Almost surely, 2^401551141 is an apocalyptic number.

It is an amenable number.

401551141 is a deficient number, since it is larger than the sum of its proper divisors (1).

401551141 is an equidigital number, since it uses as much as digits as its factorization.

401551141 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 400, while the sum is 22.

The square root of 401551141 is about 20038.7410033665. The cubic root of 401551141 is about 737.7574799904.

The spelling of 401551141 in words is "four hundred one million, five hundred fifty-one thousand, one hundred forty-one".