1550400213 has 8 divisors (see below), whose sum is σ = 2070575008. Its totient is φ = 1031912784.

The previous prime is 1550400191. The next prime is 1550400227. The reversal of 1550400213 is 3120040551.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1550400213 - 2¹² = 1550396117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1550400213.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550400253) 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 7 ways as a sum of consecutive naturals, for example, 419695 + ... + 423372.

It is an arithmetic number, because the mean of its divisors is an integer number (258821876).

Almost surely, 2^1550400213 is an apocalyptic number.

It is an amenable number.

1550400213 is a deficient number, since it is larger than the sum of its proper divisors (520174795).

1550400213 is an equidigital number, since it uses as much as digits as its factorization.

1550400213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843683.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 1550400213 is about 39375.1217521927. The cubic root of 1550400213 is about 1157.3941239204.

Adding to 1550400213 its reverse (3120040551), we get a palindrome (4670440764).

The spelling of 1550400213 in words is "one billion, five hundred fifty million, four hundred thousand, two hundred thirteen".