551001605 has 16 divisors (see below), whose sum is σ = 824356224. Its totient is φ = 343481280.

The previous prime is 551001587. The next prime is 551001623. The reversal of 551001605 is 506100155.

It is an interprime number because it is at equal distance from previous prime (551001587) and next prime (551001623).

It is not a de Polignac number, because 551001605 - 2⁶ = 551001541 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 715202 + ... + 715971.

It is an arithmetic number, because the mean of its divisors is an integer number (51522264).

Almost surely, 2^551001605 is an apocalyptic number.

551001605 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

551001605 is a deficient number, since it is larger than the sum of its proper divisors (273354619).

551001605 is a wasteful number, since it uses less digits than its factorization.

551001605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431196.

The product of its (nonzero) digits is 750, while the sum is 23.

The square root of 551001605 is about 23473.4233762355. The cubic root of 551001605 is about 819.8183243164.

The spelling of 551001605 in words is "five hundred fifty-one million, one thousand, six hundred five".