61430311 has 4 divisors (see below), whose sum is σ = 61449912. Its totient is φ = 61410712.

The previous prime is 61430297. The next prime is 61430351. The reversal of 61430311 is 11303416.

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 61430311 - 2⁵ = 61430279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61430351) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3925 + ... + 11758.

It is an arithmetic number, because the mean of its divisors is an integer number (15362478).

Almost surely, 2^61430311 is an apocalyptic number.

61430311 is a deficient number, since it is larger than the sum of its proper divisors (19601).

61430311 is a wasteful number, since it uses less digits than its factorization.

61430311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19600.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 61430311 is about 7837.7491028994. The cubic root of 61430311 is about 394.5731885031.

Adding to 61430311 its reverse (11303416), we get a palindrome (72733727).

The spelling of 61430311 in words is "sixty-one million, four hundred thirty thousand, three hundred eleven".