61322331 has 16 divisors (see below), whose sum is σ = 94183424. Its totient is φ = 34763904.

The previous prime is 61322323. The next prime is 61322341. The reversal of 61322331 is 13322316.

It is not a de Polignac number, because 61322331 - 2³ = 61322323 is a prime.

It is a super-2 number, since 2×61322331² = 7520856558547122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61322298 and 61322307.

It is not an unprimeable number, because it can be changed into a prime (61322311) 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, 8830 + ... + 14163.

It is an arithmetic number, because the mean of its divisors is an integer number (5886464).

Almost surely, 2^61322331 is an apocalyptic number.

61322331 is a deficient number, since it is larger than the sum of its proper divisors (32861093).

61322331 is a wasteful number, since it uses less digits than its factorization.

61322331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23130.

The product of its digits is 648, while the sum is 21.

The square root of 61322331 is about 7830.8576158681. The cubic root of 61322331 is about 394.3418640403.

Adding to 61322331 its reverse (13322316), we get a palindrome (74644647).

The spelling of 61322331 in words is "sixty-one million, three hundred twenty-two thousand, three hundred thirty-one".