400211131531551 has 16 divisors (see below), whose sum is σ = 538697176262784. Its totient is φ = 264267136129824.

The previous prime is 400211131531529. The next prime is 400211131531583. The reversal of 400211131531551 is 155135131112004.

It is not a de Polignac number, because 400211131531551 - 2²¹ = 400211129434399 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400211131531591) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108459901 + ... + 112089126.

It is an arithmetic number, because the mean of its divisors is an integer number (33668573516424).

Almost surely, 2^{400211131531551} is an apocalyptic number.

400211131531551 is a deficient number, since it is larger than the sum of its proper divisors (138486044731233).

400211131531551 is a wasteful number, since it uses less digits than its factorization.

400211131531551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220554790.

The product of its (nonzero) digits is 9000, while the sum is 33.

Adding to 400211131531551 its reverse (155135131112004), we get a palindrome (555346262643555).

The spelling of 400211131531551 in words is "four hundred trillion, two hundred eleven billion, one hundred thirty-one million, five hundred thirty-one thousand, five hundred fifty-one".