61765231 has 8 divisors (see below), whose sum is σ = 67596624. Its totient is φ = 55969920.

The previous prime is 61765201. The next prime is 61765259. The reversal of 61765231 is 13256716.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61765231 - 2⁹ = 61764719 is a prime.

It is a super-2 number, since 2×61765231² = 7629887520966722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61765193 and 61765202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61765201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5370 + ... + 12343.

It is an arithmetic number, because the mean of its divisors is an integer number (8449578).

Almost surely, 2^61765231 is an apocalyptic number.

61765231 is a deficient number, since it is larger than the sum of its proper divisors (5831393).

61765231 is a wasteful number, since it uses less digits than its factorization.

61765231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18041.

The product of its digits is 7560, while the sum is 31.

The square root of 61765231 is about 7859.0858883206. The cubic root of 61765231 is about 395.2889644349.

The spelling of 61765231 in words is "sixty-one million, seven hundred sixty-five thousand, two hundred thirty-one".