401551335422502 has 16 divisors (see below), whose sum is σ = 807911668876032. Its totient is φ = 133048945469000.

The previous prime is 401551335422443. The next prime is 401551335422519. The reversal of 401551335422502 is 205224533155104.

It is a super-2 number, since 2×401551335422502² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200374916874 + ... + 200374918877.

It is an arithmetic number, because the mean of its divisors is an integer number (50494479304752).

Almost surely, 2^{401551335422502} is an apocalyptic number.

401551335422502 is an abundant number, since it is smaller than the sum of its proper divisors (406360333453530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

401551335422502 is a wasteful number, since it uses less digits than its factorization.

401551335422502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 400749835923.

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 401551335422502 its reverse (205224533155104), we get a palindrome (606775868577606).

The spelling of 401551335422502 in words is "four hundred one trillion, five hundred fifty-one billion, three hundred thirty-five million, four hundred twenty-two thousand, five hundred two".