401501613 has 4 divisors (see below), whose sum is σ = 535335488. Its totient is φ = 267667740.

The previous prime is 401501579. The next prime is 401501623. The reversal of 401501613 is 316105104.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 401501613 - 2²⁶ = 334392749 is a prime.

It is a super-2 number, since 2×401501613² = 322407090483203538, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 401501613.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401501623) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66916933 + ... + 66916938.

It is an arithmetic number, because the mean of its divisors is an integer number (133833872).

Almost surely, 2^401501613 is an apocalyptic number.

It is an amenable number.

401501613 is a deficient number, since it is larger than the sum of its proper divisors (133833875).

401501613 is a wasteful number, since it uses less digits than its factorization.

401501613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133833874.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 401501613 is about 20037.5051590761. The cubic root of 401501613 is about 737.7271466563.

Adding to 401501613 its reverse (316105104), we get a palindrome (717606717).

The spelling of 401501613 in words is "four hundred one million, five hundred one thousand, six hundred thirteen".