401552617 has 4 divisors (see below), whose sum is σ = 404483796. Its totient is φ = 398621440.

The previous prime is 401552609. The next prime is 401552651. The reversal of 401552617 is 716255104.

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

It can be written as a sum of positive squares in 2 ways, for example, as 75533481 + 326019136 = 8691^2 + 18056^2 .

It is a cyclic number.

It is not a de Polignac number, because 401552617 - 2³ = 401552609 is a prime.

It is a super-2 number, since 2×401552617² = 322489008439097378, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (401552117) 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, 1465384 + ... + 1465657.

It is an arithmetic number, because the mean of its divisors is an integer number (101120949).

Almost surely, 2^401552617 is an apocalyptic number.

It is an amenable number.

401552617 is a deficient number, since it is larger than the sum of its proper divisors (2931179).

401552617 is a wasteful number, since it uses less digits than its factorization.

401552617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2931178.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 401552617 is about 20038.7778319936. Note that the first 3 decimals coincide. The cubic root of 401552617 is about 737.7583839257.

The spelling of 401552617 in words is "four hundred one million, five hundred fifty-two thousand, six hundred seventeen".