401021158524 has 144 divisors (see below), whose sum is σ = 1124105342976. Its totient is φ = 110831414400.

The previous prime is 401021158523. The next prime is 401021158553. The reversal of 401021158524 is 425851120104.

It is a super-2 number, since 2×401021158524² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401021158523) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60932914 + ... + 60939494.

It is an arithmetic number, because the mean of its divisors is an integer number (7806287104).

Almost surely, 2^401021158524 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 401021158524, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (562052671488).

401021158524 is an abundant number, since it is smaller than the sum of its proper divisors (723084184452).

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

401021158524 is a wasteful number, since it uses less digits than its factorization.

401021158524 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9976 (or 9967 counting only the distinct ones).

The product of its (nonzero) digits is 12800, while the sum is 33.

Adding to 401021158524 its reverse (425851120104), we get a palindrome (826872278628).

The spelling of 401021158524 in words is "four hundred one billion, twenty-one million, one hundred fifty-eight thousand, five hundred twenty-four".