615032231 has 6 divisors (see below), whose sum is σ = 676027296. Its totient is φ = 559120100.

The previous prime is 615032221. The next prime is 615032233. The reversal of 615032231 is 132230516.

It is not a de Polignac number, because 615032231 - 2¹⁸ = 614770087 is a prime.

It is a super-2 number, since 2×615032231² = 756529290337674722, 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 = 615032197 and 615032206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (615032233) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2541335 + ... + 2541576.

It is an arithmetic number, because the mean of its divisors is an integer number (112671216).

Almost surely, 2^615032231 is an apocalyptic number.

615032231 is a deficient number, since it is larger than the sum of its proper divisors (60995065).

615032231 is a wasteful number, since it uses less digits than its factorization.

615032231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5082933 (or 5082922 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 23.

The square root of 615032231 is about 24799.8433664408. The cubic root of 615032231 is about 850.4183550742.

Adding to 615032231 its reverse (132230516), we get a palindrome (747262747).

The spelling of 615032231 in words is "six hundred fifteen million, thirty-two thousand, two hundred thirty-one".