55133657431 has 2 divisors, whose sum is σ = 55133657432. Its totient is φ = 55133657430.

The previous prime is 55133657393. The next prime is 55133657519. The reversal of 55133657431 is 13475633155.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55133657431 - 2¹³ = 55133649239 is a prime.

It is a super-2 number, since 2×55133657431² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55133657731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27566828715 + 27566828716.

It is an arithmetic number, because the mean of its divisors is an integer number (27566828716).

Almost surely, 2^55133657431 is an apocalyptic number.

55133657431 is a deficient number, since it is larger than the sum of its proper divisors (1).

55133657431 is an equidigital number, since it uses as much as digits as its factorization.

55133657431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 567000, while the sum is 43.

The spelling of 55133657431 in words is "fifty-five billion, one hundred thirty-three million, six hundred fifty-seven thousand, four hundred thirty-one".