1642154231 has 2 divisors, whose sum is σ = 1642154232. Its totient is φ = 1642154230.

The previous prime is 1642154177. The next prime is 1642154303. The reversal of 1642154231 is 1324512461.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1642154231 - 2⁶ = 1642154167 is a prime.

It is a super-2 number, since 2×1642154231² = 5393341036782402722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1642154194 and 1642154203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1642154431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 821077115 + 821077116.

It is an arithmetic number, because the mean of its divisors is an integer number (821077116).

Almost surely, 2^1642154231 is an apocalyptic number.

1642154231 is a deficient number, since it is larger than the sum of its proper divisors (1).

1642154231 is an equidigital number, since it uses as much as digits as its factorization.

1642154231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5760, while the sum is 29.

The square root of 1642154231 is about 40523.5022055103. The cubic root of 1642154231 is about 1179.7898292256.

Adding to 1642154231 its reverse (1324512461), we get a palindrome (2966666692).

The spelling of 1642154231 in words is "one billion, six hundred forty-two million, one hundred fifty-four thousand, two hundred thirty-one".