1551403421202 has 32 divisors (see below), whose sum is σ = 3125731536000. Its totient is φ = 513318359808.

The previous prime is 1551403421189. The next prime is 1551403421273. The reversal of 1551403421202 is 2021243041551.

It is a self number, because there is not a number n which added to its sum of digits gives 1551403421202.

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, 748443 + ... + 1913889.

It is an arithmetic number, because the mean of its divisors is an integer number (97679110500).

Almost surely, 2^{1551403421202} is an apocalyptic number.

1551403421202 is an abundant number, since it is smaller than the sum of its proper divisors (1574328114798).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1551403421202 is a wasteful number, since it uses less digits than its factorization.

1551403421202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167090.

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 1551403421202 its reverse (2021243041551), we get a palindrome (3572646462753).

The spelling of 1551403421202 in words is "one trillion, five hundred fifty-one billion, four hundred three million, four hundred twenty-one thousand, two hundred two".