55251001 has 12 divisors (see below), whose sum is σ = 61227408. Its totient is φ = 49808304.

The previous prime is 55250989. The next prime is 55251013. The reversal of 55251001 is 10015255.

55251001 = T₂₉₀₉ + T₂₉₁₀ + ... + T₂₉₂₁.

It is an interprime number because it is at equal distance from previous prime (55250989) and next prime (55251013).

It is not a de Polignac number, because 55251001 - 2¹⁷ = 55119929 is a prime.

It is a super-2 number, since 2×55251001² = 6105346223004002, which contains 22 as substring.

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 55251001.

It is not an unprimeable number, because it can be changed into a prime (55251041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3466 + ... + 11068.

It is an arithmetic number, because the mean of its divisors is an integer number (5102284).

Almost surely, 2^55251001 is an apocalyptic number.

It is an amenable number.

55251001 is a deficient number, since it is larger than the sum of its proper divisors (5976407).

55251001 is a wasteful number, since it uses less digits than its factorization.

55251001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7672 (or 7659 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 55251001 is about 7433.1017079009. The cubic root of 55251001 is about 380.8728803004.

Adding to 55251001 its reverse (10015255), we get a palindrome (65266256).

The spelling of 55251001 in words is "fifty-five million, two hundred fifty-one thousand, one".