1550401051 has 4 divisors (see below), whose sum is σ = 1551746872. Its totient is φ = 1549055232.

The previous prime is 1550401049. The next prime is 1550401087. The reversal of 1550401051 is 1501040551.

It is a happy number.

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 1550401051 - 2¹ = 1550401049 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1550401001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671181 + ... + 673486.

It is an arithmetic number, because the mean of its divisors is an integer number (387936718).

Almost surely, 2^1550401051 is an apocalyptic number.

1550401051 is a deficient number, since it is larger than the sum of its proper divisors (1345821).

1550401051 is a wasteful number, since it uses less digits than its factorization.

1550401051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1345820.

The product of its (nonzero) digits is 500, while the sum is 22.

The square root of 1550401051 is about 39375.1323934282. The cubic root of 1550401051 is about 1157.3943324463.

The spelling of 1550401051 in words is "one billion, five hundred fifty million, four hundred one thousand, fifty-one".