2154731 has 2 divisors, whose sum is σ = 2154732. Its totient is φ = 2154730.

The previous prime is 2154727. The next prime is 2154743. The reversal of 2154731 is 1374512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2154731 - 2² = 2154727 is a prime.

It is a super-2 number, since 2×2154731² = 9285731364722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2154697 and 2154706.

It is not a weakly prime, because it can be changed into another prime (2154791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077365 + 1077366.

It is an arithmetic number, because the mean of its divisors is an integer number (1077366).

2^2154731 is an apocalyptic number.

2154731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154731 is an equidigital number, since it uses as much as digits as its factorization.

2154731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 840, while the sum is 23.

The square root of 2154731 is about 1467.9002009674. The cubic root of 2154731 is about 129.1608873354.

The spelling of 2154731 in words is "two million, one hundred fifty-four thousand, seven hundred thirty-one".