61015651 has 2 divisors, whose sum is σ = 61015652. Its totient is φ = 61015650.

The previous prime is 61015637. The next prime is 61015673. The reversal of 61015651 is 15651016.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61015651 - 2¹³ = 61007459 is a prime.

It is not a weakly prime, because it can be changed into another prime (61015051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30507825 + 30507826.

It is an arithmetic number, because the mean of its divisors is an integer number (30507826).

Almost surely, 2^61015651 is an apocalyptic number.

61015651 is a deficient number, since it is larger than the sum of its proper divisors (1).

61015651 is an equidigital number, since it uses as much as digits as its factorization.

61015651 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 900, while the sum is 25.

The square root of 61015651 is about 7811.2515642501. The cubic root of 61015651 is about 393.6833821621.

Adding to 61015651 its reverse (15651016), we get a palindrome (76666667).

It can be divided in two parts, 610 and 15651, that added together give a palindrome (16261).

The spelling of 61015651 in words is "sixty-one million, fifteen thousand, six hundred fifty-one".