55154992201 has 3 divisors (see below), whose sum is σ = 55155227053. Its totient is φ = 55154757350.

The previous prime is 55154992177. The next prime is 55154992229. The reversal of 55154992201 is 10229945155.

It is a happy number.

The square root of 55154992201 is 234851.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 55154992201 - 2¹⁷ = 55154861129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55154992241) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 117426 + ... + 352276.

Almost surely, 2^55154992201 is an apocalyptic number.

55154992201 is the 234851-st square number.

55154992201 is the 117426-th centered octagonal number.

It is an amenable number.

55154992201 is a deficient number, since it is larger than the sum of its proper divisors (234852).

55154992201 is an frugal number, since it uses more digits than its factorization.

55154992201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469702 (or 234851 counting only the distinct ones).

The product of its (nonzero) digits is 162000, while the sum is 43.

The spelling of 55154992201 in words is "fifty-five billion, one hundred fifty-four million, nine hundred ninety-two thousand, two hundred one".