55821631519 has 2 divisors, whose sum is σ = 55821631520. Its totient is φ = 55821631518.

The previous prime is 55821631499. The next prime is 55821631561. The reversal of 55821631519 is 91513612855.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 55821631519 - 2¹⁵ = 55821598751 is a prime.

It is a super-2 number, since 2×55821631519² (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 (55821631219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27910815759 + 27910815760.

It is an arithmetic number, because the mean of its divisors is an integer number (27910815760).

Almost surely, 2^55821631519 is an apocalyptic number.

55821631519 is a deficient number, since it is larger than the sum of its proper divisors (1).

55821631519 is an equidigital number, since it uses as much as digits as its factorization.

55821631519 is an evil number, because the sum of its binary digits is even.

The product of its digits is 324000, while the sum is 46.

The spelling of 55821631519 in words is "fifty-five billion, eight hundred twenty-one million, six hundred thirty-one thousand, five hundred nineteen".