1555001231401 has 16 divisors (see below), whose sum is σ = 1612542055680. Its totient is φ = 1498500622080.

The previous prime is 1555001231353. The next prime is 1555001231411. The reversal of 1555001231401 is 1041321005551.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1555001231401 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1555001231401.

It is not an unprimeable number, because it can be changed into a prime (1555001231411) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6690735 + ... + 6919243.

It is an arithmetic number, because the mean of its divisors is an integer number (100783878480).

Almost surely, 2^{1555001231401} is an apocalyptic number.

It is an amenable number.

1555001231401 is a deficient number, since it is larger than the sum of its proper divisors (57540824279).

1555001231401 is a wasteful number, since it uses less digits than its factorization.

1555001231401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230784.

The product of its (nonzero) digits is 3000, while the sum is 28.

Adding to 1555001231401 its reverse (1041321005551), we get a palindrome (2596322236952).

The spelling of 1555001231401 in words is "one trillion, five hundred fifty-five billion, one million, two hundred thirty-one thousand, four hundred one".