401551335422501 has 16 divisors (see below), whose sum is σ = 440328129312768. Its totient is φ = 363157479529200.

The previous prime is 401551335422443. The next prime is 401551335422519. The reversal of 401551335422501 is 105224533155104.

It is a cyclic number.

It is not a de Polignac number, because 401551335422501 - 2¹⁰ = 401551335421477 is a prime.

It is a super-2 number, since 2×401551335422501² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401551335422201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104363915 + ... + 108143096.

It is an arithmetic number, because the mean of its divisors is an integer number (27520508082048).

Almost surely, 2^{401551335422501} is an apocalyptic number.

It is an amenable number.

401551335422501 is a deficient number, since it is larger than the sum of its proper divisors (38776793890267).

401551335422501 is a wasteful number, since it uses less digits than its factorization.

401551335422501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212507912.

The product of its (nonzero) digits is 360000, while the sum is 41.

Adding to 401551335422501 its reverse (105224533155104), we get a palindrome (506775868577605).

The spelling of 401551335422501 in words is "four hundred one trillion, five hundred fifty-one billion, three hundred thirty-five million, four hundred twenty-two thousand, five hundred one".