1550422551 has 4 divisors (see below), whose sum is σ = 2067230072. Its totient is φ = 1033615032.

The previous prime is 1550422547. The next prime is 1550422583. The reversal of 1550422551 is 1552240551.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1550422551 - 2² = 1550422547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1550422501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258403756 + ... + 258403761.

It is an arithmetic number, because the mean of its divisors is an integer number (516807518).

Almost surely, 2^1550422551 is an apocalyptic number.

1550422551 is a deficient number, since it is larger than the sum of its proper divisors (516807521).

1550422551 is an equidigital number, since it uses as much as digits as its factorization.

1550422551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 516807520.

The product of its (nonzero) digits is 10000, while the sum is 30.

The square root of 1550422551 is about 39375.4054074368. The cubic root of 1550422551 is about 1157.3996824305.

The spelling of 1550422551 in words is "one billion, five hundred fifty million, four hundred twenty-two thousand, five hundred fifty-one".