61331395 has 4 divisors (see below), whose sum is σ = 73597680. Its totient is φ = 49065112.

The previous prime is 61331371. The next prime is 61331399. The reversal of 61331395 is 59313316.

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

It is a cyclic number.

It is not a de Polignac number, because 61331395 - 2¹⁹ = 60807107 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61331399) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6133135 + ... + 6133144.

It is an arithmetic number, because the mean of its divisors is an integer number (18399420).

Almost surely, 2^61331395 is an apocalyptic number.

61331395 is a deficient number, since it is larger than the sum of its proper divisors (12266285).

61331395 is a wasteful number, since it uses less digits than its factorization.

61331395 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12266284.

The product of its digits is 7290, while the sum is 31.

The square root of 61331395 is about 7831.4363305846. The cubic root of 61331395 is about 394.3612921916.

The spelling of 61331395 in words is "sixty-one million, three hundred thirty-one thousand, three hundred ninety-five".