55351001 has 4 divisors (see below), whose sum is σ = 56847012. Its totient is φ = 53854992.

The previous prime is 55350989. The next prime is 55351039. The reversal of 55351001 is 10015355.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 51552400 + 3798601 = 7180^2 + 1949^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55351001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55351081) 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, 747950 + ... + 748023.

It is an arithmetic number, because the mean of its divisors is an integer number (14211753).

Almost surely, 2^55351001 is an apocalyptic number.

It is an amenable number.

55351001 is a deficient number, since it is larger than the sum of its proper divisors (1496011).

55351001 is a wasteful number, since it uses less digits than its factorization.

55351001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1496010.

The product of its (nonzero) digits is 375, while the sum is 20.

The square root of 55351001 is about 7439.8253339712. The cubic root of 55351001 is about 381.1025252062.

Subtracting from 55351001 its sum of digits (20), we obtain a triangular number (55350981 = T₁₀₅₂₁).

Adding to 55351001 its reverse (10015355), we get a palindrome (65366356).

The spelling of 55351001 in words is "fifty-five million, three hundred fifty-one thousand, one".