61219857 has 8 divisors (see below), whose sum is σ = 81986976. Its totient is φ = 40632992.

The previous prime is 61219849. The next prime is 61219861. The reversal of 61219857 is 75891216.

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

It is a cyclic number.

It is not a de Polignac number, because 61219857 - 2³ = 61219849 is a prime.

It is a super-2 number, since 2×61219857² = 7495741782200898, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61219817) 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, 44268 + ... + 45629.

It is an arithmetic number, because the mean of its divisors is an integer number (10248372).

Almost surely, 2^61219857 is an apocalyptic number.

It is an amenable number.

61219857 is a deficient number, since it is larger than the sum of its proper divisors (20767119).

61219857 is a wasteful number, since it uses less digits than its factorization.

61219857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90127.

The product of its digits is 30240, while the sum is 39.

The square root of 61219857 is about 7824.3119186290. The cubic root of 61219857 is about 394.1220837545.

The spelling of 61219857 in words is "sixty-one million, two hundred nineteen thousand, eight hundred fifty-seven".