1555021243402 has 32 divisors (see below), whose sum is σ = 2546953403904. Its totient is φ = 706168929600.

The previous prime is 1555021243379. The next prime is 1555021243421. The reversal of 1555021243402 is 2043421205551.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 169369252 + ... + 169378432.

It is an arithmetic number, because the mean of its divisors is an integer number (79592293872).

Almost surely, 2^{1555021243402} is an apocalyptic number.

1555021243402 is a deficient number, since it is larger than the sum of its proper divisors (991932160502).

1555021243402 is a wasteful number, since it uses less digits than its factorization.

1555021243402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15534.

The product of its (nonzero) digits is 48000, while the sum is 34.

Adding to 1555021243402 its reverse (2043421205551), we get a palindrome (3598442448953).

The spelling of 1555021243402 in words is "one trillion, five hundred fifty-five billion, twenty-one million, two hundred forty-three thousand, four hundred two".