61215201 has 12 divisors (see below), whose sum is σ = 91471380. Its totient is φ = 39402720.

The previous prime is 61215199. The next prime is 61215211. The reversal of 61215201 is 10251216.

61215201 is a `hidden beast` number, since 612 + 1 + 52 + 0 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 32216976 + 28998225 = 5676^2 + 5385^2 .

It is not a de Polignac number, because 61215201 - 2¹ = 61215199 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61215211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 117010 + ... + 117531.

It is an arithmetic number, because the mean of its divisors is an integer number (7622615).

Almost surely, 2^61215201 is an apocalyptic number.

It is an amenable number.

61215201 is a deficient number, since it is larger than the sum of its proper divisors (30256179).

61215201 is a wasteful number, since it uses less digits than its factorization.

61215201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234576 (or 234573 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 61215201 is about 7824.0143788211. The cubic root of 61215201 is about 394.1120920130.

Adding to 61215201 its reverse (10251216), we get a palindrome (71466417).

It can be divided in two parts, 61215 and 201, that added together give a palindrome (61416).

The spelling of 61215201 in words is "sixty-one million, two hundred fifteen thousand, two hundred one".