211250400455 has 4 divisors (see below), whose sum is σ = 253500480552. Its totient is φ = 169000320360.

The previous prime is 211250400433. The next prime is 211250400461. The reversal of 211250400455 is 554004052112.

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

It is not a de Polignac number, because 211250400455 - 2⁸ = 211250400199 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21125040041 + ... + 21125040050.

It is an arithmetic number, because the mean of its divisors is an integer number (63375120138).

Almost surely, 2^211250400455 is an apocalyptic number.

211250400455 is a deficient number, since it is larger than the sum of its proper divisors (42250080097).

211250400455 is an equidigital number, since it uses as much as digits as its factorization.

211250400455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42250080096.

The product of its (nonzero) digits is 8000, while the sum is 29.

Adding to 211250400455 its reverse (554004052112), we get a palindrome (765254452567).

The spelling of 211250400455 in words is "two hundred eleven billion, two hundred fifty million, four hundred thousand, four hundred fifty-five".