213442255431 has 48 divisors (see below), whose sum is σ = 313759721184. Its totient is φ = 139802775552.

The previous prime is 213442255427. The next prime is 213442255471. The reversal of 213442255431 is 134552244312.

It is a happy number.

213442255431 is a `hidden beast` number, since 2 + 1 + 34 + 42 + 2 + 554 + 31 = 666.

It is not a de Polignac number, because 213442255431 - 2² = 213442255427 is a prime.

It is a super-2 number, since 2×213442255431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (213442255471) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 78672531 + ... + 78675243.

It is an arithmetic number, because the mean of its divisors is an integer number (6536660858).

Almost surely, 2^213442255431 is an apocalyptic number.

213442255431 is a deficient number, since it is larger than the sum of its proper divisors (100317465753).

213442255431 is a wasteful number, since it uses less digits than its factorization.

213442255431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3440 (or 3437 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

Adding to 213442255431 its reverse (134552244312), we get a palindrome (347994499743).

The spelling of 213442255431 in words is "two hundred thirteen billion, four hundred forty-two million, two hundred fifty-five thousand, four hundred thirty-one".