400771487531 has 8 divisors (see below), whose sum is σ = 419874223104. Its totient is φ = 382054665960.

The previous prime is 400771487503. The next prime is 400771487549. The reversal of 400771487531 is 135784177004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400771487531 - 2²⁶ = 400704378667 is a prime.

It is a super-2 number, since 2×400771487531² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400771487551) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96476375 + ... + 96480528.

It is an arithmetic number, because the mean of its divisors is an integer number (52484277888).

Almost surely, 2^400771487531 is an apocalyptic number.

400771487531 is a deficient number, since it is larger than the sum of its proper divisors (19102735573).

400771487531 is a wasteful number, since it uses less digits than its factorization.

400771487531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192957001.

The product of its (nonzero) digits is 658560, while the sum is 47.

The spelling of 400771487531 in words is "four hundred billion, seven hundred seventy-one million, four hundred eighty-seven thousand, five hundred thirty-one".