615225461 has 8 divisors (see below), whose sum is σ = 651979224. Its totient is φ = 578534400.

The previous prime is 615225439. The next prime is 615225493. The reversal of 615225461 is 164522516.

615225461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 2910436 + 612315025 = 1706^2 + 24745^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 615225461 - 2¹⁸ = 614963317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615228461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5351 + ... + 35483.

It is an arithmetic number, because the mean of its divisors is an integer number (81497403).

Almost surely, 2^615225461 is an apocalyptic number.

It is an amenable number.

615225461 is a deficient number, since it is larger than the sum of its proper divisors (36753763).

615225461 is a wasteful number, since it uses less digits than its factorization.

615225461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31351.

The product of its digits is 14400, while the sum is 32.

The square root of 615225461 is about 24803.7388512297. The cubic root of 615225461 is about 850.5074068475.

Adding to 615225461 its reverse (164522516), we get a palindrome (779747977).

It can be divided in two parts, 6152 and 25461, that added together give a palindrome (31613).

The spelling of 615225461 in words is "six hundred fifteen million, two hundred twenty-five thousand, four hundred sixty-one".