61220497 has 8 divisors (see below), whose sum is σ = 66765440. Its totient is φ = 55794960.

The previous prime is 61220491. The next prime is 61220521. The reversal of 61220497 is 79402216.

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

It is a de Polignac number, because none of the positive numbers 2^k-61220497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61220491) 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, 28779 + ... + 30832.

It is an arithmetic number, because the mean of its divisors is an integer number (8345680).

Almost surely, 2^61220497 is an apocalyptic number.

It is an amenable number.

61220497 is a deficient number, since it is larger than the sum of its proper divisors (5544943).

61220497 is a wasteful number, since it uses less digits than its factorization.

61220497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59703.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 61220497 is about 7824.3528166871. The cubic root of 61220497 is about 394.1234571501.

The spelling of 61220497 in words is "sixty-one million, two hundred twenty thousand, four hundred ninety-seven".