55812015 has 48 divisors (see below), whose sum is σ = 111341568. Its totient is φ = 25334208.

The previous prime is 55812013. The next prime is 55812023. The reversal of 55812015 is 51021855.

It is not a de Polignac number, because 55812015 - 2¹ = 55812013 is a prime.

It is a super-2 number, since 2×55812015² = 6229962036720450, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 55812015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55812013) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 50802 + ... + 51888.

It is an arithmetic number, because the mean of its divisors is an integer number (2319616).

Almost surely, 2^55812015 is an apocalyptic number.

55812015 is a deficient number, since it is larger than the sum of its proper divisors (55529553).

55812015 is a wasteful number, since it uses less digits than its factorization.

55812015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1268 (or 1265 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 55812015 is about 7470.7439388591. The cubic root of 55812015 is about 382.1576585776.

The spelling of 55812015 in words is "fifty-five million, eight hundred twelve thousand, fifteen".