61947231 has 8 divisors (see below), whose sum is σ = 82672560. Its totient is φ = 41260032.

The previous prime is 61947229. The next prime is 61947233. The reversal of 61947231 is 13274916.

It is an interprime number because it is at equal distance from previous prime (61947229) and next prime (61947233).

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

It is not a de Polignac number, because 61947231 - 2¹ = 61947229 is a prime.

It is a super-2 number, since 2×61947231² = 7674918857134722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 61947192 and 61947201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61947233) 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 7 ways as a sum of consecutive naturals, for example, 5496 + ... + 12413.

It is an arithmetic number, because the mean of its divisors is an integer number (10334070).

Almost surely, 2^61947231 is an apocalyptic number.

61947231 is a deficient number, since it is larger than the sum of its proper divisors (20725329).

61947231 is a wasteful number, since it uses less digits than its factorization.

61947231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19065.

The product of its digits is 9072, while the sum is 33.

The square root of 61947231 is about 7870.6563258727. The cubic root of 61947231 is about 395.6768420094.

The spelling of 61947231 in words is "sixty-one million, nine hundred forty-seven thousand, two hundred thirty-one".