55215151009 has 4 divisors (see below), whose sum is σ = 56389941504. Its totient is φ = 54040360516.

The previous prime is 55215151007. The next prime is 55215151021. The reversal of 55215151009 is 90015151255.

It is a happy number.

55215151009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 90015151255 = 5 ⋅18003030251.

It is a cyclic number.

It is not a de Polignac number, because 55215151009 - 2¹ = 55215151007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55215151007) 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, 587395177 + ... + 587395270.

It is an arithmetic number, because the mean of its divisors is an integer number (14097485376).

Almost surely, 2^55215151009 is an apocalyptic number.

It is an amenable number.

55215151009 is a deficient number, since it is larger than the sum of its proper divisors (1174790495).

55215151009 is a wasteful number, since it uses less digits than its factorization.

55215151009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1174790494.

The product of its (nonzero) digits is 11250, while the sum is 34.

The spelling of 55215151009 in words is "fifty-five billion, two hundred fifteen million, one hundred fifty-one thousand, nine".