3521018025 has 48 divisors (see below), whose sum is σ = 7392284800. Its totient is φ = 1609606080.

The previous prime is 3521017961. The next prime is 3521018029. The reversal of 3521018025 is 5208101253.

It is a happy number.

It is not a de Polignac number, because 3521018025 - 2⁶ = 3521017961 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 3521018025.

It is not an unprimeable number, because it can be changed into a prime (3521018029) 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, 367870 + ... + 377319.

Almost surely, 2^3521018025 is an apocalyptic number.

3521018025 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

3521018025 is an abundant number, since it is smaller than the sum of its proper divisors (3871266775).

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

3521018025 is a wasteful number, since it uses less digits than its factorization.

3521018025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745215 (or 745204 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 3521018025 is about 59338.1666804764. The cubic root of 3521018025 is about 1521.3276179224.

Adding to 3521018025 its reverse (5208101253), we get a palindrome (8729119278).

It can be divided in two parts, 35210 and 18025, that added together give a palindrome (53235).

The spelling of 3521018025 in words is "three billion, five hundred twenty-one million, eighteen thousand, twenty-five".