1865215053 has 16 divisors (see below), whose sum is σ = 2975842240. Its totient is φ = 1147824432.

The previous prime is 1865215049. The next prime is 1865215057. The reversal of 1865215053 is 3505125681.

It is a happy number.

1865215053 is a `hidden beast` number, since 1 + 86 + 521 + 5 + 0 + 53 = 666.

It is an interprime number because it is at equal distance from previous prime (1865215049) and next prime (1865215057).

It is not a de Polignac number, because 1865215053 - 2² = 1865215049 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1865214999 and 1865215017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1865215057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2656651 + ... + 2657352.

It is an arithmetic number, because the mean of its divisors is an integer number (185990140).

Almost surely, 2^1865215053 is an apocalyptic number.

1865215053 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1865215053 is a deficient number, since it is larger than the sum of its proper divisors (1110627187).

1865215053 is a wasteful number, since it uses less digits than its factorization.

1865215053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5314025 (or 5314019 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 1865215053 is about 43188.1355582757. The cubic root of 1865215053 is about 1230.9572500658.

The spelling of 1865215053 in words is "one billion, eight hundred sixty-five million, two hundred fifteen thousand, fifty-three".