215067540 has 24 divisors (see below), whose sum is σ = 602189280. Its totient is φ = 57351328.

The previous prime is 215067529. The next prime is 215067551. The reversal of 215067540 is 45760512.

215067540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (215067529) and next prime (215067551).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 215067498 and 215067507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1792170 + ... + 1792289.

It is an arithmetic number, because the mean of its divisors is an integer number (25091220).

Almost surely, 2^215067540 is an apocalyptic number.

215067540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215067540 is an abundant number, since it is smaller than the sum of its proper divisors (387121740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

215067540 is a wasteful number, since it uses less digits than its factorization.

215067540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3584471 (or 3584469 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 30.

The square root of 215067540 is about 14665.1812126547. The cubic root of 215067540 is about 599.1353657222.

The spelling of 215067540 in words is "two hundred fifteen million, sixty-seven thousand, five hundred forty".