1555230664531 has 4 divisors (see below), whose sum is σ = 1557084337200. Its totient is φ = 1553376991864.

The previous prime is 1555230664517. The next prime is 1555230664571. The reversal of 1555230664531 is 1354660325551.

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

It is a cyclic number.

It is not a de Polignac number, because 1555230664531 - 2⁵ = 1555230664499 is a prime.

It is a super-2 number, since 2×1555230664531² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1555230664571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 926835076 + ... + 926836753.

It is an arithmetic number, because the mean of its divisors is an integer number (389271084300).

Almost surely, 2^{1555230664531} is an apocalyptic number.

1555230664531 is a deficient number, since it is larger than the sum of its proper divisors (1853672669).

1555230664531 is an equidigital number, since it uses as much as digits as its factorization.

1555230664531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1853672668.

The product of its (nonzero) digits is 1620000, while the sum is 46.

The spelling of 1555230664531 in words is "one trillion, five hundred fifty-five billion, two hundred thirty million, six hundred sixty-four thousand, five hundred thirty-one".