31400055 has 80 divisors (see below), whose sum is σ = 60496128. Its totient is φ = 15552000.

The previous prime is 31400053. The next prime is 31400063. The reversal of 31400055 is 55000413.

It is not a de Polignac number, because 31400055 - 2¹ = 31400053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31400053) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 514725 + ... + 514785.

Almost surely, 2^31400055 is an apocalyptic number.

31400055 is a deficient number, since it is larger than the sum of its proper divisors (29096073).

31400055 is a wasteful number, since it uses less digits than its factorization.

31400055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 31400055 is about 5603.5751980321. The cubic root of 31400055 is about 315.4836108870.

Adding to 31400055 its reverse (55000413), we get a palindrome (86400468).

The spelling of 31400055 in words is "thirty-one million, four hundred thousand, fifty-five".