61621301 has 16 divisors (see below), whose sum is σ = 73764864. Its totient is φ = 50330544.

The previous prime is 61621291. The next prime is 61621303. The reversal of 61621301 is 10312616.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61621301 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61621303) 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, 55316 + ... + 56418.

It is an arithmetic number, because the mean of its divisors is an integer number (4610304).

Almost surely, 2^61621301 is an apocalyptic number.

It is an amenable number.

61621301 is a deficient number, since it is larger than the sum of its proper divisors (12143563).

61621301 is a wasteful number, since it uses less digits than its factorization.

61621301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1480.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 61621301 is about 7849.9236302018. The cubic root of 61621301 is about 394.9816815732.

Adding to 61621301 its reverse (10312616), we get a palindrome (71933917).

The spelling of 61621301 in words is "sixty-one million, six hundred twenty-one thousand, three hundred one".