401155513631 has 4 divisors (see below), whose sum is σ = 401172327192. Its totient is φ = 401138700072.

The previous prime is 401155513621. The next prime is 401155513639. The reversal of 401155513631 is 136315551104.

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

It is a cyclic number.

It is not a de Polignac number, because 401155513631 - 2¹⁸ = 401155251487 is a prime.

It is a super-2 number, since 2×401155513631² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 401155513591 and 401155513600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401155513639) 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, 8370941 + ... + 8418726.

It is an arithmetic number, because the mean of its divisors is an integer number (100293081798).

Almost surely, 2^401155513631 is an apocalyptic number.

401155513631 is a deficient number, since it is larger than the sum of its proper divisors (16813561).

401155513631 is a wasteful number, since it uses less digits than its factorization.

401155513631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16813560.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 401155513631 in words is "four hundred one billion, one hundred fifty-five million, five hundred thirteen thousand, six hundred thirty-one".