61222945 has 24 divisors (see below), whose sum is σ = 85407552. Its totient is φ = 41270880.

The previous prime is 61222937. The next prime is 61222951. The reversal of 61222945 is 54922216.

It is not a de Polignac number, because 61222945 - 2³ = 61222937 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 176262 + ... + 176608.

It is an arithmetic number, because the mean of its divisors is an integer number (3558648).

Almost surely, 2^61222945 is an apocalyptic number.

It is an amenable number.

61222945 is a deficient number, since it is larger than the sum of its proper divisors (24184607).

61222945 is an equidigital number, since it uses as much as digits as its factorization.

61222945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 501 (or 430 counting only the distinct ones).

The product of its digits is 8640, while the sum is 31.

The square root of 61222945 is about 7824.5092497869. The cubic root of 61222945 is about 394.1287103001.

The spelling of 61222945 in words is "sixty-one million, two hundred twenty-two thousand, nine hundred forty-five".