61222801 has 4 divisors (see below), whose sum is σ = 61372900. Its totient is φ = 61072704.

The previous prime is 61222789. The next prime is 61222823. The reversal of 61222801 is 10822216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23030401 + 38192400 = 4799^2 + 6180^2 .

It is a cyclic number.

It is not a de Polignac number, because 61222801 - 2⁷ = 61222673 is a prime.

It is the 7825-th Hogben number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61222201) by changing a digit.

It is a nontrivial repunit in base 7824.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74436 + ... + 75253.

It is an arithmetic number, because the mean of its divisors is an integer number (15343225).

Almost surely, 2^61222801 is an apocalyptic number.

It is an amenable number.

61222801 is a deficient number, since it is larger than the sum of its proper divisors (150099).

61222801 is a wasteful number, since it uses less digits than its factorization.

61222801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150098.

The product of its (nonzero) digits is 384, while the sum is 22.

The square root of 61222801 is about 7824.5000479264. The cubic root of 61222801 is about 394.1284012952.

The spelling of 61222801 in words is "sixty-one million, two hundred twenty-two thousand, eight hundred one".