61253651 has 4 divisors (see below), whose sum is σ = 61334904. Its totient is φ = 61172400.

The previous prime is 61253641. The next prime is 61253653. The reversal of 61253651 is 15635216.

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-61253651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61253653) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39485 + ... + 41006.

It is an arithmetic number, because the mean of its divisors is an integer number (15333726).

Almost surely, 2^61253651 is an apocalyptic number.

61253651 is a deficient number, since it is larger than the sum of its proper divisors (81253).

61253651 is an equidigital number, since it uses as much as digits as its factorization.

61253651 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81252.

The product of its digits is 5400, while the sum is 29.

The square root of 61253651 is about 7826.4711716073. The cubic root of 61253651 is about 394.1945902492.

Adding to 61253651 its reverse (15635216), we get a palindrome (76888867).

The spelling of 61253651 in words is "sixty-one million, two hundred fifty-three thousand, six hundred fifty-one".