2651551231 has 4 divisors (see below), whose sum is σ = 3030344272. Its totient is φ = 2272758192.

The previous prime is 2651551223. The next prime is 2651551267. The reversal of 2651551231 is 1321551562.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1321551562 = 2 ⋅660775781.

It is a cyclic number.

It is not a de Polignac number, because 2651551231 - 2³ = 2651551223 is a prime.

It is a super-2 number, since 2×2651551231² = 14061447861235230722, 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 = 2651551193 and 2651551202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2651551211) 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, 189396510 + ... + 189396523.

It is an arithmetic number, because the mean of its divisors is an integer number (757586068).

Almost surely, 2^2651551231 is an apocalyptic number.

2651551231 is a deficient number, since it is larger than the sum of its proper divisors (378793041).

2651551231 is an equidigital number, since it uses as much as digits as its factorization.

2651551231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 378793040.

The product of its digits is 9000, while the sum is 31.

The square root of 2651551231 is about 51493.2153880489. The cubic root of 2651551231 is about 1384.0974680972.

The spelling of 2651551231 in words is "two billion, six hundred fifty-one million, five hundred fifty-one thousand, two hundred thirty-one".