31261400455 has 16 divisors (see below), whose sum is σ = 39180587040. Its totient is φ = 23920762752.

The previous prime is 31261400437. The next prime is 31261400461. The reversal of 31261400455 is 55400416213.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 31261400455 - 2⁷ = 31261400327 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1421124 + ... + 1442953.

It is an arithmetic number, because the mean of its divisors is an integer number (2448786690).

Almost surely, 2^31261400455 is an apocalyptic number.

31261400455 is a deficient number, since it is larger than the sum of its proper divisors (7919186585).

31261400455 is a wasteful number, since it uses less digits than its factorization.

31261400455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2864178.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 31261400455 its reverse (55400416213), we get a palindrome (86661816668).

The spelling of 31261400455 in words is "thirty-one billion, two hundred sixty-one million, four hundred thousand, four hundred fifty-five".