551061386 has 4 divisors (see below), whose sum is σ = 826592082. Its totient is φ = 275530692.

The previous prime is 551061377. The next prime is 551061437. The reversal of 551061386 is 683160155.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 683160155 = 5 ⋅136632031.

It can be written as a sum of positive squares in only one way, i.e., 441210025 + 109851361 = 21005^2 + 10481^2 .

It is a super-2 number, since 2×551061386² = 607337302280481992, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 137765345 + ... + 137765348.

Almost surely, 2^551061386 is an apocalyptic number.

551061386 is a deficient number, since it is larger than the sum of its proper divisors (275530696).

551061386 is a wasteful number, since it uses less digits than its factorization.

551061386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275530695.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 551061386 is about 23474.6967179557. The cubic root of 551061386 is about 819.8479720141.

The spelling of 551061386 in words is "five hundred fifty-one million, sixty-one thousand, three hundred eighty-six".