61220519 has 16 divisors (see below), whose sum is σ = 67145760. Its totient is φ = 55587840.

The previous prime is 61220491. The next prime is 61220521. The reversal of 61220519 is 91502216.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61220519 is a prime.

It is a super-2 number, since 2×61220519² = 7495903893258722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61220569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64589 + ... + 65529.

It is an arithmetic number, because the mean of its divisors is an integer number (4196610).

Almost surely, 2^61220519 is an apocalyptic number.

61220519 is a deficient number, since it is larger than the sum of its proper divisors (5925241).

61220519 is a wasteful number, since it uses less digits than its factorization.

61220519 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090.

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

The square root of 61220519 is about 7824.3542225541. The cubic root of 61220519 is about 394.1235043604.

The spelling of 61220519 in words is "sixty-one million, two hundred twenty thousand, five hundred nineteen".