61501229 has 2 divisors, whose sum is σ = 61501230. Its totient is φ = 61501228.

The previous prime is 61501211. The next prime is 61501249. The reversal of 61501229 is 92210516.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56280004 + 5221225 = 7502^2 + 2285^2 .

It is a cyclic number.

It is not a de Polignac number, because 61501229 - 2⁸ = 61500973 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61501198 and 61501207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61501249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30750614 + 30750615.

It is an arithmetic number, because the mean of its divisors is an integer number (30750615).

Almost surely, 2^61501229 is an apocalyptic number.

It is an amenable number.

61501229 is a deficient number, since it is larger than the sum of its proper divisors (1).

61501229 is an equidigital number, since it uses as much as digits as its factorization.

61501229 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 26.

The square root of 61501229 is about 7842.2719284656. The cubic root of 61501229 is about 394.7249679737.

The spelling of 61501229 in words is "sixty-one million, five hundred one thousand, two hundred twenty-nine".