61152251 has 4 divisors (see below), whose sum is σ = 61351752. Its totient is φ = 60952752.

The previous prime is 61152209. The next prime is 61152263. The reversal of 61152251 is 15225116.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61152251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61152551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99290 + ... + 99903.

It is an arithmetic number, because the mean of its divisors is an integer number (15337938).

Almost surely, 2^61152251 is an apocalyptic number.

61152251 is a deficient number, since it is larger than the sum of its proper divisors (199501).

61152251 is a wasteful number, since it uses less digits than its factorization.

61152251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 199500.

The product of its digits is 600, while the sum is 23.

The square root of 61152251 is about 7819.9904731400. The cubic root of 61152251 is about 393.9769520217.

Adding to 61152251 its reverse (15225116), we get a palindrome (76377367).

The spelling of 61152251 in words is "sixty-one million, one hundred fifty-two thousand, two hundred fifty-one".